libvlc: Make sure we don't continue vlc exectution if no modules where found.

This is done to better diagnosticate misconfiguration of libvlc path.

src/libvlc.c

@@ -475,6 +475,12 @@ int libvlc_InternalInit( libvlc_int_t *p_libvlc, int i_argc,
     module_list_free( list );
     msg_Dbg( p_libvlc, "module bank initialized (%zu modules)", module_count );
 
+    if( module_count <= 1)
+    {
+        msg_Err( p_libvlc, "No modules were found, refusing to start. Check "
+                           "that you properly gave a module path with --plugin-path.");
+        abort();
+    }
     /* Check for help on modules */
     if( (p_tmp = config_GetPsz( p_libvlc, "module" )) )
     {