Add flag to make the baserom work

LTTP_RND_GeneralBugfixes.asm

@@ -50,6 +50,7 @@ dw !ROM_VERSION_HIGH
 function hexto555(h) = ((((h&$FF)/8)<<10)|(((h>>8&$FF)/8)<<5)|(((h>>16&$FF)/8)<<0))
 
 ; Feature flags, run asar with -DFEATURE_X=1 to enable
+!FEATURE_FIX_BASEROM ?= 0
 
 ;================================================================================