Original commit message from CVS: * ext/amrnb/amrnbdec.c: (gst_amrnb_variant_get_type), (gst_amrnbdec_class_init), (gst_amrnbdec_set_property), (gst_amrnbdec_get_property), (gst_amrnbdec_chain): * ext/amrnb/amrnbdec.h: Add a property to select the amr variant. Fixes #424070.