[gimp] plug-ins: silence some warnings in twain plug-in.

[Jehan <jehanp src gnome org>]

commit 9e3508cc23c1d4ba376d7d2ab7361fdfc25ab1a9
Author: Jacob Boerema <jgboerema gmail com>
Date:   Fri Sep 18 17:49:07 2020 -0400

    plug-ins: silence some warnings in twain plug-in.

 plug-ins/twain/tw_func.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/plug-ins/twain/tw_func.c b/plug-ins/twain/tw_func.c
index 8baa7b313a..79f2ac5296 100644
--- a/plug-ins/twain/tw_func.c
+++ b/plug-ins/twain/tw_func.c
@@ -696,7 +696,7 @@ cancelPendingTransfers(pTW_SESSION twSession)
 static int
 endImageTransfer(pTW_SESSION twSession, int *pendingCount)
 {
-  gboolean continueTransfers;
+  gboolean continueTransfers = FALSE;
   int exitCode = twSession->twRC;
 
   /* Have now exited the transfer for some reason... Figure out
@@ -713,6 +713,10 @@ endImageTransfer(pTW_SESSION twSession, int *pendingCount)
     LogMessage("Failure received\n");
     *pendingCount = endPendingTransfer(twSession);
     break;
+
+  default:
+    *pendingCount = 0;
+    break;
   }
 
   /* Call the end transfer callback */