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File opencv-gles.patch of Package opencv

--- opencv-3.1.0.orig/modules/highgui/src/window_QT.cpp	2015-12-18 16:02:16.000000000 +0100
+++ opencv-3.1.0/modules/highgui/src/window_QT.cpp	2016-02-26 22:31:37.004570651 +0100
@@ -3165,7 +3165,9 @@
 
 void OpenGlViewPort::initializeGL()
 {
+#ifdef GL_PERSPECTIVE_CORRECTION_HINT
     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
+#endif
 }
 
 void OpenGlViewPort::resizeGL(int w, int h)