package/libv4l: qt4 support depends on OpenGL

Fixes
http://autobuild.buildroot.net/results/8fc/8fc8cbc85dacebce5cb6ab13f5ff3b0764117471/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libv4l/libv4l.mk

@@ -54,7 +54,7 @@ LIBV4L_CONF_ENV += \
 	ac_cv_prog_MOC=$(HOST_DIR)/usr/bin/moc \
 	ac_cv_prog_RCC=$(HOST_DIR)/usr/bin/rcc \
 	ac_cv_prog_UIC=$(HOST_DIR)/usr/bin/uic
-else ifeq ($(BR2_PACKAGE_QT_GUI_MODULE),y)
+else ifeq ($(BR2_PACKAGE_QT_OPENGL_GL_DESKTOP),y)
 LIBV4L_CONF_OPTS += --enable-qv4l2
 LIBV4L_DEPENDENCIES += qt
 else