glsl: Pass ctx->Const.NativeIntegers to do_common_optimization().

The next few patches will introduce an optimization that only works when
integers are not represented as floating point values.

v2: Re-word-wrap a line, as requested by Ian Romanick.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>

src/glsl/ir_optimization.h

@@ -67,7 +67,8 @@ enum lower_packing_builtins_op {
 bool do_common_optimization(exec_list *ir, bool linked,
 			    bool uniform_locations_assigned,
 			    unsigned max_unroll_iterations,
-                            const struct gl_shader_compiler_options *options);
+                            const struct gl_shader_compiler_options *options,
+                            bool native_integers);
 
 bool do_algebraic(exec_list *instructions);
 bool do_constant_folding(exec_list *instructions);