Error out if critical OSD-related defines are not set

(cherry picked from commit 25b89439bb)

kaffeine/src/player-parts/xine-part/kxinewidget.cpp

@@ -1513,6 +1513,14 @@ bool KXineWidget::playDvb()
 	return true;
 }
 
+#ifndef Q_BYTE_ORDER
+#error Q_BYTE_ORDER is not defined!
+#endif
+
+#ifndef TQ_LITTLE_ENDIAN
+#error TQ_LITTLE_ENDIAN is not defined!
+#endif
+
 #if Q_BYTE_ORDER == TQ_LITTLE_ENDIAN
 #define rgb2yuv(R,G,B) ((((((66*R+129*G+25*B+128)>>8)+16)<<8)|(((112*R-94*G-18*B+128)>>8)+128))<<8|(((-38*R-74*G+112*B+128)>>8)+128))
 #else