- fixed: Crushing generic floors must use crush mode 2.

This is how Doom always worked. Mode 1 is not useful for one-time crushing effects.

# Conflicts:
#	src/p_lnspec.cpp

src/p_lnspec.cpp

@@ -565,7 +565,7 @@ FUNC(LS_Generic_Floor)
 	}
 
 	return EV_DoFloor (type, ln, arg0, SPEED(arg1), arg2,
-					   (arg4 & 16) ? 20 : -1, arg4 & 7, false);
+					   (arg4 & 16) ? 20 : -1, arg4 & 7, true);
 					   
 }