should fix GS codes that don't work on games which use lcd interrupts instead of vblank

thanks unmacaque

git-svn-id: https://svn.code.sf.net/p/vbam/code/trunk@1014 a31d4220-a93d-0410-bf67-fe4944624d44

src/gb/GB.cpp

@@ -2016,6 +2016,7 @@ void gbVblank_interrupt()
 
 void gbLcd_interrupt()
 {
+  gbCheatWrite(false); // Emulates GS codes.
   gbMemory[0xff0f] = register_IF &= 0xfd;
   gbWriteMemory(--SP.W, PC.B.B1);
   gbWriteMemory(--SP.W, PC.B.B0);