SNES: Set mallocAlwaysInternal to 64KB

This is just an easy change to use the internal heap freed from the split with retro-core.

Granular control of the internal allocations based on fcipaq's changes will obviously be the better long-term solution.

Author: ducalex

snes9x/main/main_snes.c

@@ -346,6 +346,7 @@ void app_main(void)
         .sampleRate = AUDIO_SAMPLE_RATE,
         .storageRequired = true,
         .romRequired = true,
+        .mallocAlwaysInternal = 0x10000,
         .handlers.loadState = &load_state_handler,
         .handlers.saveState = &save_state_handler,
         .handlers.reset = &reset_handler,