(svn r2971) - Newgrf: Support loading VarAction2 parameter for variables 0x60-0x7F. This parameter isn't used yet.

sprite.h

@@ -70,6 +70,7 @@ typedef struct DeterministicSpriteGroup {
 	// Take this variable:
 	VarSpriteGroupScope var_scope;
 	byte variable;
+	byte parameter; ///< Used for variables between 0x60 and 0x7F inclusive.
 
 	// Do this with it:
 	byte shift_num;