Fix a bunch of -Wempty-body warnings reported by clang

Many of these were real bugs, like:

if (cond);
   do_something

etc...

Others were just cosmetic - like placing the ';' on a separate line to
make the intention clear.

cde/lib/DtPrint/PsubUtil.c

@@ -573,7 +573,8 @@ _DtPrintGetDefaultXPrinterName(
     else if((default_printer = getenv("XPRINTER")) != (String)NULL);
     else if((default_printer = getenv("PDPRINTER")) != (String)NULL);
     else if((default_printer = getenv("LPDEST")) != (String)NULL);
-    else if((default_printer = getenv("PRINTER")) != (String)NULL);
+    else if((default_printer = getenv("PRINTER")) != (String)NULL)
+        ;
     /*
      * return a copy of the printer name
      */

cde/lib/DtSvc/DtUtil1/GetMwmW.c

@@ -149,7 +149,7 @@ _GetMwmWindow(
 		}
 	    }
 
-	    if (rcode == Success);
+	    if (rcode == Success)
 	    {
 		*pMwmWindow = pWmInfo->wmWindow;
 	    }

cde/programs/dtappbuilder/src/ab/attch_ed_stubs.c

@@ -3670,7 +3670,7 @@ attch_ed_verify_props(void)
      * Get parent of current object
      */
     parent = obj_get_parent(ats->cur_object);
-    if (parent);
+    if (parent)
         parent = obj_get_root(parent);
 
     /*

cde/programs/dtappbuilder/src/ab/prop.c

@@ -2634,11 +2634,11 @@ propP_popup_message(
 	/*
 	 * Free help data strings
 	 */
-	if (help_data.help_text);
+	if (help_data.help_text)
 	    XtFree(help_data.help_text);
-	if (help_data.help_volume);
+	if (help_data.help_volume)
 	    XtFree(help_data.help_volume);
-	if (help_data.help_locationID);
+	if (help_data.help_locationID)
 	    XtFree(help_data.help_locationID);
     }
     else

cde/programs/dtcalc/functions.c

@@ -539,8 +539,9 @@ do_calc(void)      /* Perform arithmetic calculation and display result. */
       mpcdm(&dres, v->MPresult) ;
     }
 
-  else if (IS_KEY(v->cur_op, KEY_EQ)) /* do nothing. */ ;   /* Equals */
-
+  else if (IS_KEY(v->cur_op, KEY_EQ))                  /* Equals */
+      ; /* do nothing. */
+  
   show_display(v->MPresult) ;
 
   if (!(IS_KEY(v->current, KEY_EQ) && IS_KEY(v->old_cal_value, KEY_EQ)))

cde/programs/dtdocbook/instant/tables.c

@@ -768,7 +768,8 @@ TblTableRowEnd(
     if ((at = FindAttValByName(e, "ROWSEP"))) {
 	if (at[0] == '1') fprintf(fp, "_\n");
     }
-    else if (rowsep) /* fprintf(fp, "_\n") */ ;
+    else if (rowsep) /* fprintf(fp, "_\n") */
+        ;
 }
 
 /*

cde/programs/dtlogin/util.c

@@ -705,9 +705,10 @@ ScanNLSDir(char *dirname)
               continue;
 
 	    if (locale[0] != '.' &&
-                LANGLISTSIZE > (int) (strlen(languageList)+strlen(locale)+2));
+                LANGLISTSIZE > (int) (strlen(languageList)+strlen(locale)+2))
 	    {
-		(void) sprintf(locale_path, "%s/%s", dirname, locale);
+		(void) snprintf(locale_path, MAXPATHLEN, "%s/%s",
+                                dirname, locale);
 	        retval = stat(locale_path, &locale_stat);
 
 	    	if (0 == retval && S_ISDIR(locale_stat.st_mode))

cde/programs/dtmail/MotifApp/DialogManager.C

@@ -417,9 +417,14 @@ DialogManager::forceUpdate( Widget w )
   if ( !w )
     return;
   XtAppContext cxt=XtWidgetToApplicationContext( w );
-  for (diashell=w;!XtIsShell(diashell);diashell=XtParent(diashell));
-  for ( topshell=diashell;XtIsTopLevelShell( topshell );
-	topshell = XtParent( topshell ) );
+  for (diashell=w;
+       !XtIsShell(diashell);
+       diashell=XtParent(diashell))
+      ;
+  for ( topshell=diashell;
+        XtIsTopLevelShell( topshell );
+        topshell = XtParent( topshell ) )
+      ;
 
 //  if (XtIsRealized(diashell) && XtIsRealized(topshell)){
     dpy=XtDisplay(diashell);

cde/programs/dtmail/libDtMail/Common/DtMailRc.C

@@ -2050,8 +2050,8 @@ DtMail::MailRc::expand(char *name)
 	close(pivec[1]);
 	l = read(pivec[0], xname, LINESIZE);
 	close(pivec[0]);
-	while (wait(&s) != pid);
-		;
+	while (wait(&s) != pid)
+            ;
 	s &= 0377;
 	if (s != 0 && s != SIGPIPE) {
 		fprintf(stderr, "Echo failed\n");

cde/programs/dtmail/libDtMail/Common/DtMailServer.C

@@ -789,8 +789,9 @@ DtMailServer::retrieve_messages(DtMailEnv &error)
 	if (ok != DTME_MailServerAccess_SocketIOError)
 	  if (ok == DTME_NoError)
 	    ok = ptrans_quit();
-	  else
+	  else {
 	    (void) ptrans_quit();
+          }
 	vtalarm_setitimer(0);
 	SockClose(_sockfp);
 	_sockfp = NULL;

cde/programs/dtpad/printSetup.c

@@ -280,7 +280,7 @@ PrintSetupDestroy(PrintSetup *pSetup)
 
     if (pSetup->docName)
       free(pSetup->docName);
-    if (pSetup->dtprintSetup);
+    if (pSetup->dtprintSetup)
       _psReleasePrintSetupDialog(pSetup);
     XtFree((char*) pSetup);
 }