RTP: Fix GStreamer version check

cmake/FindGIO.cmake

@@ -8,7 +8,6 @@ find_pkg_config_with_fallback(GIO
 )
 
 if(GIO_FOUND AND NOT GIO_VERSION)
-    # TODO
     find_package(GLib ${GLib_GLOBAL_VERSION})
     set(GIO_VERSION ${GLib_VERSION})
 endif()

cmake/FindGstRtp.cmake

@@ -8,6 +8,11 @@ find_pkg_config_with_fallback(GstRtp
     DEPENDS Gst
 )
 
+if(GstRtp_FOUND AND NOT GstRtp_VERSION)
+    find_package(Gst)
+    set(GstRtp_VERSION ${Gst_VERSION})
+endif()
+
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(GstRtp
     REQUIRED_VARS GstRtp_LIBRARY

plugins/rtp/CMakeLists.txt

@@ -12,7 +12,7 @@ find_packages(RTP_PACKAGES REQUIRED
     GstAudio
 )
 
-if(Gst_VERSION VERSION_GREATER "1.16")
+if(GstRtp_VERSION VERSION_GREATER "1.16")
     set(RTP_DEFINITIONS GST_1_16)
 endif()