Changed JAVASCRIPT_MAX_BYTES definition from 8MB to 4MB.

Created JAVASCRIPT_GC_FREQUENCY definition for branch callbacks.

src/sbbs3/sbbsdefs.h

@@ -65,10 +65,11 @@
 #define UNKNOWN_LOAD_ERROR	"Unknown load error - Library mismatch?"
 
 #ifdef JAVASCRIPT
-	#define	JAVASCRIPT_MAX_BYTES		(8*1024*1024)
+	#define	JAVASCRIPT_MAX_BYTES		(4*1024*1024)
 	#define JAVASCRIPT_CONTEXT_STACK	(16*1024)
 	#define JAVASCRIPT_BRANCH_LIMIT		99999999
 	#define JAVASCRIPT_YIELD_FREQUENCY	10000
+	#define JAVASCRIPT_GC_FREQUENCY		100 
 #endif
 
 #ifndef __FLAT__