twn_util.c: make alloc failure death message clearer

src/twn_util.c

@@ -66,10 +66,9 @@ void log_warn(const char *restrict format, ...) {
 _Noreturn static void alloc_failure_death(void) {
     log_critical("Allocation failure. Aborting NOW.");
     SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,
-                             "MEMORY ALLOCATION FAILURE.",
-                             "FAILED TO ALLOCATE MEMORY. "
-                             "YOU MIGHT BE UNLUCKY. "
-                             "THE GAME WILL EXIT NOW.",
+                             "MEMORY ALLOCATION FAILURE",
+                             "CRITICAL MEMORY ALLOCATION FAILED. "
+                             "EXITING IMMEDIATELY!",
                              NULL);
 
     die_abruptly();