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

(cherry picked from commit 6a2200823c to reduce conflicts merging between SDL2 and SDL3)

test/testfilesystem.c

@@ -29,7 +29,7 @@ main(int argc, char *argv[])
     }
 
     base_path = SDL_GetBasePath();
-    if(base_path == NULL){
+    if (base_path == NULL) {
       SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't find base path: %s\n",
                    SDL_GetError());
     } else {
@@ -38,7 +38,7 @@ main(int argc, char *argv[])
     }
 
     pref_path = SDL_GetPrefPath("libsdl", "test_filesystem");
-    if(pref_path == NULL){
+    if (pref_path == NULL) {
       SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't find pref path: %s\n",
                    SDL_GetError());
     } else {
@@ -47,7 +47,7 @@ main(int argc, char *argv[])
     }
 
     pref_path = SDL_GetPrefPath(NULL, "test_filesystem");
-    if(pref_path == NULL){
+    if (pref_path == NULL) {
       SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't find pref path without organization: %s\n",
                    SDL_GetError());
     } else {