fix osx gl include

diff --git a/src/gl-fun.h b/src/gl-fun.h
index e555c99..bae8dc3 100644
--- a/src/gl-fun.h
+++ b/src/gl-fun.h
@@ -59,9 +59,6 @@ typedef void (APIENTRYP PFNGLACTIVETEXTUREPROC) (GLenum texture);
 typedef void (APIENTRY * _GLDEBUGPROC) (GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* message, const void *userParam);
 typedef void (APIENTRYP _PFNGLDEBUGMESSAGECALLBACKPROC) (_GLDEBUGPROC callback, const void *userParam);

-#ifdef GLES2_HEADER
-#define GL_NUM_EXTENSIONS 0x821D
-
 /* Buffer object */
 typedef void (APIENTRYP PFNGLGENBUFFERSPROC) (GLsizei n, GLuint* buffers);
 typedef void (APIENTRYP PFNGLDELETEBUFFERSPROC) (GLsizei n, const GLuint* buffers);
@@ -101,8 +98,6 @@ typedef void (APIENTRYP PFNGLDISABLEVERTEXATTRIBARRAYPROC) (GLuint);
 typedef void (APIENTRYP PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* pointer);

 /* Framebuffer object */
-#define GL_READ_FRAMEBUFFER 0x8CA8
-#define GL_DRAW_FRAMEBUFFER 0x8CA9
 typedef void (APIENTRYP PFNGLGENFRAMEBUFFERSPROC) (GLsizei n, GLuint* framebuffers);
 typedef void (APIENTRYP PFNGLDELETEFRAMEBUFFERSPROC) (GLsizei n, const GLuint* framebuffers);
 typedef void (APIENTRYP PFNGLBINDFRAMEBUFFERPROC) (GLenum target, GLuint framebuffer);
@@ -113,6 +108,11 @@ typedef void (APIENTRYP PFNGLBLITFRAMEBUFFERPROC) (GLint srcX0, GLint srcY0, GLi
 typedef void (APIENTRYP PFNGLGENVERTEXARRAYSPROC) (GLsizei n, GLuint* arrays);
 typedef void (APIENTRYP PFNGLDELETEVERTEXARRAYSPROC) (GLsizei n, const GLuint* arrays);
 typedef void (APIENTRYP PFNGLBINDVERTEXARRAYPROC) (GLuint array);
+
+#ifdef GLES2_HEADER
+#define GL_NUM_EXTENSIONS 0x821D
+#define GL_READ_FRAMEBUFFER 0x8CA8
+#define GL_DRAW_FRAMEBUFFER 0x8CA9
 #endif

 #define GL_20_FUN \