[Piglit] [PATCH] drawoverhead: Fix Windows builds.

[Jose Fonseca]

On Windows, OpenGL entrypoints need to be declared with APIENTRY
qualifier to get the right calling convention.  Using the piglit
dispactch typedefs makes this even easier.
---
 tests/perf/drawoverhead.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/perf/drawoverhead.c b/tests/perf/drawoverhead.c
index 429375f2d..2bc04fabf 100644
--- a/tests/perf/drawoverhead.c
+++ b/tests/perf/drawoverhead.c
@@ -521,8 +521,8 @@ static void
 draw_state_change(unsigned count)
 {
 	unsigned i;
-	void (*enable)(GLenum) = glEnable;
-	void (*disable)(GLenum) = glDisable;
+	PFNGLENABLEPROC enable = glEnable;
+	PFNGLDISABLEPROC disable = glDisable;
 	GLenum glenum = enable_enum;
 
 	if (is_compat && enable_enum == GL_PRIMITIVE_RESTART) {
-- 
2.11.0