bugfix segfault on closre when filter never invoked

git-svn-id: https://mlt.svn.sourceforge.net/svnroot/mlt/trunk/mlt@723 d19143bc-622f-0410-bfdd-b5b2a6649095

diff --git a/src/modules/jackrack/filter_ladspa.c b/src/modules/jackrack/filter_ladspa.c
index bb71307..b9b362d 100644 (file)
--- a/src/modules/jackrack/filter_ladspa.c
+++ b/src/modules/jackrack/filter_ladspa.c
@@ -153,19 +153,21 @@ static void filter_close( mlt_filter this )
        char mlt_name[20];
        mlt_properties properties = MLT_FILTER_PROPERTIES( this );
        
-       for ( i = 0; i < mlt_properties_get_int( properties, "channels" ); i++ )
+       if ( mlt_properties_get_data( properties, "jackrack", NULL ) != NULL )
        {
-               snprintf( mlt_name, sizeof( mlt_name ), "obuf%d", i );
-               mlt_pool_release( mlt_properties_get_data( properties, mlt_name, NULL ) );
-               snprintf( mlt_name, sizeof( mlt_name ), "ibuf%d", i );
-               mlt_pool_release( mlt_properties_get_data( properties, mlt_name, NULL ) );
-       }
-       mlt_pool_release( mlt_properties_get_data( properties, "output_buffers", NULL ) );
-       mlt_pool_release( mlt_properties_get_data( properties, "input_buffers", NULL ) );
-
-       jack_rack_t *jackrack = mlt_properties_get_data( properties, "jackrack", NULL );
-       jack_rack_destroy( jackrack );
+               for ( i = 0; i < mlt_properties_get_int( properties, "channels" ); i++ )
+               {
+                       snprintf( mlt_name, sizeof( mlt_name ), "obuf%d", i );
+                       mlt_pool_release( mlt_properties_get_data( properties, mlt_name, NULL ) );
+                       snprintf( mlt_name, sizeof( mlt_name ), "ibuf%d", i );
+                       mlt_pool_release( mlt_properties_get_data( properties, mlt_name, NULL ) );
+               }
+               mlt_pool_release( mlt_properties_get_data( properties, "output_buffers", NULL ) );
+               mlt_pool_release( mlt_properties_get_data( properties, "input_buffers", NULL ) );
        
+               jack_rack_t *jackrack = mlt_properties_get_data( properties, "jackrack", NULL );
+               jack_rack_destroy( jackrack );
+       }       
        this->parent.close = NULL;
        mlt_service_close( &this->parent );
 }