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

src/filesystem/android/SDL_sysfilesystem.c

@@ -44,7 +44,7 @@ SDL_GetPrefPath(const char *org, const char *app)
     if (path) {
         size_t pathlen = SDL_strlen(path)+2;
         char *fullpath = (char *)SDL_malloc(pathlen);
-        if (!fullpath) {
+        if (fullpath == NULL) {
             SDL_OutOfMemory();
             return NULL;
         }