From Mattias Helsing, "The addition of the GStreamer cmake find script broke my build because

cmake vars weren't passed correctly to find_package_handler_args, so
while the find script didn't find a single required GStreamer lib or
include path it still reported GSTREAMER_FOUND=TRUE (and then tried to
compile the new plugin). This fixes it and correctly reports missing
components."


git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14611 16af8721-9629-0410-8352-f15c8da7e697

CMakeModules/FindGStreamer.cmake

@@ -153,7 +153,7 @@ foreach (_component ${GStreamer_FIND_COMPONENTS})
 endforeach ()
 
 include(FindPackageHandleStandardArgs)
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(GStreamer REQUIRED_VARS _GSTREAMER_REQUIRED_VARS
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(GStreamer REQUIRED_VARS ${_GSTREAMER_REQUIRED_VARS}
                                             VERSION_VAR   GSTREAMER_VERSION)
 
 mark_as_advanced(
@@ -171,4 +171,4 @@ mark_as_advanced(
     GSTREAMER_PBUTILS_LIBRARIES
     GSTREAMER_VIDEO_INCLUDE_DIRS
     GSTREAMER_VIDEO_LIBRARIES
-)
+)