glsl2: Add a method for querying if an AST type has any qualifiers.

src/glsl/ast.h

@@ -418,6 +418,7 @@ public:
 class ast_fully_specified_type : public ast_node {
 public:
    virtual void print(void) const;
+   bool has_qualifiers() const;
 
    ast_type_qualifier qualifier;
    ast_type_specifier *specifier;

src/glsl/ast_type.cpp

@@ -110,3 +110,13 @@ ast_type_specifier::ast_type_specifier(int specifier)
 
    type_name = names[specifier];
 }
+
+bool
+ast_fully_specified_type::has_qualifiers() const
+{
+   return qualifier.invariant || qualifier.constant || qualifier.attribute
+			      || qualifier.varying || qualifier.in
+			      || qualifier.out || qualifier.centroid
+			      || qualifier.uniform || qualifier.smooth
+			      || qualifier.flat || qualifier.noperspective;
+}