fix mangled gstreamer service name, fixing embedded video

avmedia/source/gstreamer/avmediagstreamer.component

 <?xml version="1.0" encoding="UTF-8"?>
 <component loader="com.sun.star.loader.SharedLibrary" xmlns="http://openoffice.org/2010/uno-components">
   <implementation name="com.sun.star.comp.media.Manager_GStreamer">
-    <service name="com.sun.star.media.Manager_GStreamer"/>
+    <service name="com.sun.star.comp.avmedia.Manager_GStreamer"/>
   </implementation>
 </component>

avmedia/source/inc/mediamisc.hxx

@@ -31,20 +31,20 @@ class ResMgr;
 #define AVMEDIA_RESID( nId ) ResId( nId, * ::avmedia::GetResMgr() )
 
 #ifdef GSTREAMER
-#define AVMEDIA_MANAGER_SERVICE_NAME "com.sun.star.media.Manager_GStreamer"
+#define AVMEDIA_MANAGER_SERVICE_NAME "com.sun.star.comp.avmedia.Manager_GStreamer"
 #else
 #ifdef WNT
 
-#define AVMEDIA_MANAGER_SERVICE_NAME                    "com.sun.star.comp.avmedia.Manager_DirectX"
+#define AVMEDIA_MANAGER_SERVICE_NAME "com.sun.star.comp.avmedia.Manager_DirectX"
 
 #else
 #ifdef QUARTZ
 
-#define AVMEDIA_MANAGER_SERVICE_NAME                    "com.sun.star.comp.avmedia.Manager_QuickTime"
+#define AVMEDIA_MANAGER_SERVICE_NAME "com.sun.star.comp.avmedia.Manager_QuickTime"
 
 #else
 
-#define AVMEDIA_MANAGER_SERVICE_NAME                    "com.sun.star.comp.avmedia.Manager_GStreamer"
+#define AVMEDIA_MANAGER_SERVICE_NAME "com.sun.star.comp.avmedia.Manager_GStreamer"
 
 #endif
 #endif

avmedia/source/viewer/mediawindowbase_impl.cxx

@@ -80,9 +80,15 @@ uno::Reference< media::XPlayer > MediaWindowBaseImpl::createPlayer( const ::rtl:
                 xPlayer = uno::Reference< ::com::sun::star::media::XPlayer >(
                     xManager->createPlayer( rURL ), uno::UNO_QUERY );
             }
+            else
+                OSL_FAIL( "failed to create media player service " AVMEDIA_MANAGER_SERVICE_NAME );
         }
-        catch( ... )
+        catch( const uno::Exception &e )
         {
+            (void)e;
+            OSL_FAIL( OSL_FORMAT( "couldn't create media player '%s', exception '%s'",
+                                  AVMEDIA_MANAGER_SERVICE_NAME,
+                                  rtl::OUStringToOString( e.Message, RTL_TEXTENCODING_UTF8 ).getStr() ) );
         }
     }