sout_std: imporve logic (and save a malloc/free)

modules/stream_out/standard.c

@@ -170,7 +170,7 @@ static int Open( vlc_object_t *p_this )
     sout_stream_sys_t   *p_sys;
 
     char *psz_mux;
-    char *psz_access=NULL;
+    char *psz_access;
     char *psz_url=NULL;
     char *psz_bind;
     char *psz_path;
@@ -185,6 +185,9 @@ static int Open( vlc_object_t *p_this )
     config_ChainParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
                    p_stream->p_cfg );
 
+    psz_access = var_GetString( p_stream, SOUT_CFG_PREFIX "access" );
+    if( EMPTY_STR(psz_access) )
+    {
         if( !strcmp( p_stream->psz_name, "http" ) )
         {
             psz_access = strdup("http");
@@ -197,16 +200,6 @@ static int Open( vlc_object_t *p_this )
         {
             psz_access = strdup("file");
         }
-
-    var_Get( p_stream, SOUT_CFG_PREFIX "access", &val );
-    if( *val.psz_string )
-    {
-        free( psz_access );
-        psz_access = val.psz_string;
-    }
-    else
-    {
-        free( val.psz_string );
     }
 
     psz_mux = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "mux" );