Make casts lose top-level qualifiers

TODO: also make them lose lvalue status

tccgen.c

@@ -2660,6 +2660,7 @@ static void gen_cast(CType *type)
                   | (lvalue_type(type->ref->type.t) & VT_LVAL_TYPE);
     }
     vtop->type = *type;
+    vtop->type.t &= ~ ( VT_CONSTANT | VT_VOLATILE | VT_ARRAY );
 }
 
 /* return type size as known at compile time. Put alignment at 'a' */

tests/tests2/94_generic.c

@@ -74,5 +74,8 @@ int main()
 	//should accept ({ }) in the controlling expr of _Generic even in const_wanted contexts
 	struct { _Bool x_0: _Generic(({0;}),default:1); } my_x;
 
+	_Generic((__typeof((float const)((float const){42}))*){0}, float*: 0); //casts lose top-level qualifiers
+	int const x = 42; __typeof((__typeof(x))x) *xp = 0; (void)_Generic(xp, int*: 0); //casts lose top-level qualifiers
+
 	return 0;
 }