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/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);
 }