glsl: Silence "unused parameter" warnings in ast_type.cpp

glsl/ast_type.cpp: In function ‘bool validate_point_mode(YYLTYPE*, _mesa_glsl_parse_state*, const ast_type_qualifier&, const ast_type_qualifier&)’:
glsl/ast_type.cpp:173:30: warning: unused parameter ‘loc’ [-Wunused-parameter]
 validate_point_mode(YYLTYPE *loc,
                              ^~~
glsl/ast_type.cpp:174:45: warning: unused parameter ‘state’ [-Wunused-parameter]
                     _mesa_glsl_parse_state *state,
                                             ^~~~~

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
diff --git a/src/compiler/glsl/ast_type.cpp b/src/compiler/glsl/ast_type.cpp
index d68e6e2..e3f06a9 100644
--- a/src/compiler/glsl/ast_type.cpp
+++ b/src/compiler/glsl/ast_type.cpp
@@ -170,10 +170,8 @@
 }
 
 static bool
-validate_point_mode(YYLTYPE *loc,
-                    _mesa_glsl_parse_state *state,
-                    const ast_type_qualifier &qualifier,
-                    const ast_type_qualifier &new_qualifier)
+validate_point_mode(MAYBE_UNUSED const ast_type_qualifier &qualifier,
+                    MAYBE_UNUSED const ast_type_qualifier &new_qualifier)
 {
    /* Point mode can only be true if the flag is set. */
    assert (!qualifier.flags.q.point_mode || !new_qualifier.flags.q.point_mode
@@ -367,7 +365,7 @@
    }
 
    if (q.flags.q.point_mode) {
-      r &= validate_point_mode(loc, state, *this, q);
+      r &= validate_point_mode(*this, q);
       this->flags.q.point_mode = 1;
       this->point_mode = q.point_mode;
    }
@@ -607,7 +605,7 @@
    r &= validate_prim_type(loc, state, *state->in_qualifier, *this);
    r &= validate_vertex_spacing(loc, state, *state->in_qualifier, *this);
    r &= validate_ordering(loc, state, *state->in_qualifier, *this);
-   r &= validate_point_mode(loc, state, *state->in_qualifier, *this);
+   r &= validate_point_mode(*state->in_qualifier, *this);
 
    return r;
 }