producer_sdl_image.c: Fix crash when attempting to play a folder without images

git-svn-id: https://mlt.svn.sourceforge.net/svnroot/mlt/trunk/mlt@1281 d19143bc-622f-0410-bfdd-b5b2a6649095

diff --git a/src/modules/sdl/producer_sdl_image.c b/src/modules/sdl/producer_sdl_image.c
index edcc112..9c3bd8b 100644 (file)
--- a/src/modules/sdl/producer_sdl_image.c
+++ b/src/modules/sdl/producer_sdl_image.c
@@ -150,23 +150,26 @@ static SDL_Surface *load_image( mlt_producer producer )
                mlt_properties_set_data( properties, "_surface", surface, 0, ( mlt_destructor )SDL_FreeSurface, 0 );
        }
 
-       image_idx = ( int )floor( ( double )position / ttl ) % mlt_properties_count( filenames );
-       this_resource = mlt_properties_get_value( filenames, image_idx );
-
-       if ( last_resource == NULL || strcmp( last_resource, this_resource ) )
+       if ( mlt_properties_count( filenames ) ) 
        {
-               surface = IMG_Load( this_resource );
-               if ( surface != NULL )
+               image_idx = ( int )floor( ( double )position / ttl ) % mlt_properties_count( filenames );
+               this_resource = mlt_properties_get_value( filenames, image_idx );
+
+               if ( last_resource == NULL || strcmp( last_resource, this_resource ) )
+               {
+                       surface = IMG_Load( this_resource );
+                       if ( surface != NULL )
+                       {
+                               surface->refcount ++;
+                               mlt_properties_set_data( properties, "_surface", surface, 0, ( mlt_destructor )SDL_FreeSurface, 0 );
+                               mlt_properties_set( properties, "_last_resource", this_resource );
+                       }
+               }
+               else if ( surface != NULL )
                {
                        surface->refcount ++;
-                       mlt_properties_set_data( properties, "_surface", surface, 0, ( mlt_destructor )SDL_FreeSurface, 0 );
-                       mlt_properties_set( properties, "_last_resource", this_resource );
                }
        }
-       else if ( surface != NULL )
-       {
-               surface->refcount ++;
-       }
 
        return surface;
 }