glsl/types: Handle all bit sizes in glsl_type_is_integer

All of the callers of this function really just want to know if the type
is an integer and don't care about bit size.

Reviewed-by: Karol Herbst <kherbst@redhat.com>

src/compiler/nir_types.cpp

@@ -355,7 +355,7 @@ glsl_type_is_boolean(const struct glsl_type *type)
 bool
 glsl_type_is_integer(const struct glsl_type *type)
 {
-   return type->is_integer();
+   return glsl_base_type_is_integer(type->base_type);
 }
 
 bool