GCN pal / jpn support, some debug work (#2375)

* d_save debug cleanup / d_s_menu debug

* gameinfo / kankyo struct debug fixes

* pal building ok

* jp building ok

* some tests with jp

* some more pal/jp tests

src/m_Do/m_Do_ext.cpp

@@ -617,6 +617,14 @@ JKRExpHeap* mDoExt_getZeldaHeap() {
     return zeldaHeap;
 }
 
+#if VERSION == VERSION_SHIELD_DEBUG
+s32 safeZeldaHeapSize = -1;
+
+s32 mDoExt_getSafeZeldaHeapSize() {
+    return safeZeldaHeapSize;
+}
+#endif
+
 /* 80450C30-80450C34 000130 0004+00 2/1 1/1 0/0 .sbss            commandHeap */
 JKRExpHeap* commandHeap;