lua_extension: factorize.

diff --git a/modules/misc/lua/extension.c b/modules/misc/lua/extension.c
index 7fa4ca2fc2b3f38d5871f84da2008973c3f74e29..498f50c9641b0b7b8a10366422f6869f644f37cb 100644 (file)
--- a/modules/misc/lua/extension.c
+++ b/modules/misc/lua/extension.c
@@ -342,61 +342,31 @@ int ScanLuaCallback( vlc_object_t *p_this, const char *psz_script,
             /* Get author */
             lua_getfield( L, -1, "author" );
             if( lua_isstring( L, -1 ) )
-            {
-                p_ext->psz_author = strdup( luaL_checkstring( L, -1 ) );
-            }
-            else
-            {
-                p_ext->psz_author = NULL;
-            }
+                p_ext->psz_author = strdup( luaL_optstring( L, -1, NULL ) );
             lua_pop( L, 1 );
 
             /* Get description */
             lua_getfield( L, -1, "description" );
             if( lua_isstring( L, -1 ) )
-            {
-                p_ext->psz_description = strdup( luaL_checkstring( L, -1 ) );
-            }
-            else
-            {
-                p_ext->psz_description = NULL;
-            }
+                p_ext->psz_description = strdup( luaL_optstring( L, -1, NULL ) );
             lua_pop( L, 1 );
 
             /* Get short description */
             lua_getfield( L, -1, "shortdesc" );
             if( lua_isstring( L, -1 ) )
-            {
-                p_ext->psz_shortdescription = strdup( luaL_checkstring( L, -1 ) );
-            }
-            else
-            {
-                p_ext->psz_shortdescription = NULL;
-            }
+                p_ext->psz_shortdescription = strdup( luaL_optstring( L, -1, NULL ) );
             lua_pop( L, 1 );
 
             /* Get URL */
             lua_getfield( L, -1, "url" );
             if( lua_isstring( L, -1 ) )
-            {
-                p_ext->psz_url = strdup( luaL_checkstring( L, -1 ) );
-            }
-            else
-            {
-                p_ext->psz_url = NULL;
-            }
+                p_ext->psz_url = strdup( luaL_optstring( L, -1, NULL ) );
             lua_pop( L, 1 );
 
             /* Get version */
             lua_getfield( L, -1, "version" );
             if( lua_isstring( L, -1 ) )
-            {
-                p_ext->psz_version = strdup( luaL_checkstring( L, -1 ) );
-            }
-            else
-            {
-                p_ext->psz_version = NULL;
-            }
+                p_ext->psz_version = strdup( luaL_optstring( L, -1, NULL ) );
             lua_pop( L, 1 );
         }
         else