Incorporate review changes

gflib/malloc.h

@@ -10,9 +10,8 @@
 
 #define TRY_FREE_AND_SET_NULL(ptr) if (ptr != NULL) FREE_AND_SET_NULL(ptr)
 
-// 122 KB. Max size of the heap without running into other data
 #define HEAP_SIZE 0x1C000
-extern u8 gHeap[];
+extern u8 gHeap[HEAP_SIZE];
 
 void *Alloc(u32 size);
 void *AllocZeroed(u32 size);