mupen core feature updates

Signed-off-by: Joseph Mattello <mail@joemattiello.com>

Cores/Mupen64Plus/Compatibility/eventloop.m

@@ -26,6 +26,7 @@
 
 #import "osd/osd.h"
 #import "main/screenshot.h"
+#import "../MupenGameCore.h"
 
 int event_set_core_defaults(void)
 {
@@ -46,9 +47,13 @@ void event_sdl_keyup(int keysym, int keymod)
 
 int event_gameshark_active(void)
 {
-    return 0;
+    GET_CURRENT_OR_RETURN(0);
+
+    return current.isGamesharkActive;
 }
 
 void event_set_gameshark(int active)
 {
+    GET_CURRENT_OR_RETURN();
+    current.isGamesharkActive = active;
 }

Cores/Mupen64Plus/Compatibility/osd.m

@@ -33,5 +33,5 @@
 
 osd_message_t * osd_message_valid(osd_message_t *m)
 {
-    return NULL;
+    return m;
 }

Cores/Mupen64Plus/MupenGameCore.h

@@ -51,6 +51,7 @@ __attribute__((visibility("default")))
 @property (nonatomic, assign) int videoWidth;
 @property (nonatomic, assign) int videoHeight;
 @property (nonatomic, assign) int videoBitDepth;
+@property (nonatomic, assign) BOOL isGamesharkActive;
 
 - (void) videoInterrupt;
 - (void) swapBuffers;