In
ddb9016be4 the GL texture driver backend was changed to include
cogl-material-opengl-private.h instead of cogl-material-private.h.
However the gles texture backend was missed from this so it was giving
a compiler warning about using an undeclared function.
#include "cogl-bitmap-private.h"
#include "cogl-texture-private.h"
#include "cogl-material.h"
-#include "cogl-material-private.h"
+#include "cogl-material-opengl-private.h"
#include "cogl-context.h"
#include "cogl-handle.h"
#include "cogl-primitives.h"