Fix minimap update in dungeon (#171)

Thanks to Rozelette for this method !

soh/src/code/z_map_exp.c

@@ -664,6 +664,7 @@ void Minimap_Draw(GlobalContext* globalCtx) {
                     if (CHECK_DUNGEON_ITEM(DUNGEON_MAP, mapIndex)) {
                         gDPSetPrimColor(OVERLAY_DISP++, 0, 0, 100, 255, 255, interfaceCtx->minimapAlpha);
 
+                        gSPInvalidateTexCache(OVERLAY_DISP++, interfaceCtx->mapSegment);
                         gDPLoadTextureBlock_4b(OVERLAY_DISP++, interfaceCtx->mapSegment, G_IM_FMT_I, 96, 85, 0,
                                                G_TX_NOMIRROR | G_TX_WRAP, G_TX_NOMIRROR | G_TX_WRAP, G_TX_NOMASK,
                                                G_TX_NOMASK, G_TX_NOLOD, G_TX_NOLOD);