imapc: Added assert to make sure callback is never NULL.

diff --git a/src/lib-imap-client/imapc-connection.c b/src/lib-imap-client/imapc-connection.c
index 9545db3b436c1360b82533e2d9edcf375d23e7ff..7b53288610388fdec8a9a101d89b197cbb5ffc73 100644 (file)
--- a/src/lib-imap-client/imapc-connection.c
+++ b/src/lib-imap-client/imapc-connection.c
@@ -1394,6 +1394,8 @@ imapc_command_begin(imapc_command_callback_t *callback, void *context)
        struct imapc_command *cmd;
        pool_t pool;
 
+       i_assert(callback != NULL);
+
        pool = pool_alloconly_create("imapc command", 2048);
        cmd = p_new(pool, struct imapc_command, 1);
        cmd->pool = pool;