sdl2,sdl3: docuemnt SDL_CHECK

Author: MartinPulec

src/video_display/sdl2.c

@@ -152,6 +152,8 @@ static const struct {
         {'q', "quit"},
 };
 
+/// @param cmd  command be excecuted checking the return falue
+/// @param ...  optional action
 #define SDL_CHECK(cmd, ...) \
         do { \
                 int ret = cmd; \

src/video_display/sdl3.c

@@ -205,6 +205,8 @@ static const struct {
         { 'q', "quit"               },
 };
 
+/// @param cmd  command be excecuted checking the return falue
+/// @param ...  optional action
 #define SDL_CHECK(cmd, ...) \
         do { \
                 if (!(cmd)) { \