ast_exists_extension() does not return an ast_device_state, so change this

function to explicitly check for the int return value.  Also, make a few
other minor changes such as removing a variable.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@73886 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_features.c

@@ -334,22 +334,21 @@ static void notify_metermaids(const char *exten, char *context)
 /*! \brief metermaids callback from devicestate.c */
 static enum ast_device_state metermaidstate(const char *data)
 {
-	enum ast_device_state res = AST_DEVICE_INVALID;
-	char *context = ast_strdupa(data);
+	char *context;
 	char *exten;
 
+	context = ast_strdupa(data);
+
 	exten = strsep(&context, "@");
 	if (!context)
-		return res;
+		return AST_DEVICE_INVALID;
 	
 	ast_debug(4, "Checking state of exten %s in context %s\n", exten, context);
 
-	res = ast_exists_extension(NULL, context, exten, 1, NULL);
-
-	if (res == AST_DEVICE_UNKNOWN)
+	if (!ast_exists_extension(NULL, context, exten, 1, NULL))
 		return AST_DEVICE_NOT_INUSE;
-	else
-		return AST_DEVICE_INUSE;
+
+	return AST_DEVICE_INUSE;
 }
 
 /*! \brief Park a call