opengl:os x build fix

modules/video_output/opengl.c

@@ -52,7 +52,7 @@
 #   define PFNGLGETSHADERINFOLOGPROC         typeof(glGetShaderInfoLog)*
 #   define PFNGLGETUNIFORMLOCATIONPROC       typeof(glGetUniformLocation)*
 #   define PFNGLGETATTRIBLOCATIONPROC        typeof(glGetAttribLocation)*
-#   define PFNGLVERTEXATTRIBLOCATIONPROC     typeof(glVertexAttribPointer)*
+#   define PFNGLVERTEXATTRIBPOINTERPROC      typeof(glVertexAttribPointer)*
 #   define PFNGLENABLEVERTEXATTRIBARRAYPROC  typeof(glEnableVertexAttribArray)*
 #   define PFNGLUNIFORM4FVPROC               typeof(glUniform4fv)*
 #   define PFNGLUNIFORM4FPROC                typeof(glUniform4f)*