Cleanup add brace (#6545)

* Add braces after if conditions

* More add braces after if conditions

* Add braces after while() conditions

* Fix compilation because of macro being modified

* Add braces to for loop

* Add braces after if/goto

* Move comments up

* Remove extra () in the 'return ...;' statements

* More remove extra () in the 'return ...;' statements

* More remove extra () in the 'return ...;' statements after merge

* Fix inconsistent patterns are xxx == NULL vs !xxx

* More "{}" for "if() break;"  and "if() continue;"

* More "{}" after if() short statement

* More "{}" after "if () return;" statement

* More fix inconsistent patterns are xxx == NULL vs !xxx

* Revert some modificaion on SDL_RLEaccel.c

* SDL_RLEaccel: no short statement

* Cleanup 'if' where the bracket is in a new line

* Cleanup 'while' where the bracket is in a new line

* Cleanup 'for' where the bracket is in a new line

* Cleanup 'else' where the bracket is in a new line

test/testiconv.c

@@ -62,9 +62,9 @@ main(int argc, char *argv[])
 
     fname = GetResourceFilename(argc > 1 ? argv[1] : NULL, "utf8.txt");
     file = fopen(fname, "rb");
-    if (!file) {
+    if (file == NULL) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unable to open %s\n", fname);
-        return (1);
+        return 1;
     }
     SDL_free(fname);
 
@@ -93,7 +93,7 @@ main(int argc, char *argv[])
     fclose(file);
 
     SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Total errors: %d\n", errors);
-    return (errors ? errors + 1 : 0);
+    return errors ? errors + 1 : 0;
 }
 
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