core: Do not modify args for ignored failures

* src/op-support.c (_gpgme_parse_failure): Ignore gpg-exit failures
before modifying args.

--
For op_decrypt_verify the status handler for both decrypt and
verify would parse the failure when the first parser ignored
the failure. This resulted in an ERR_INV_ENGINE as the first
call to parse_failure modified the args.

GnuPG-Bug-Id: T3919

1 files changed, 3 insertions, 4 deletions

diff --git a/src/op-support.c b/src/op-support.c
index 03f274cf..9414e612 100644
--- a/src/op-support.c
+++ b/src/op-support.c
@@ -414,6 +414,9 @@ _gpgme_parse_failure (char *args)
 {
   char *where, *which;
 
+  if (!strncmp (args, "gpg-exit", 8))
+    return 0;
+
   where = strchr (args, ' ');
   if (!where)
     return trace_gpg_error (GPG_ERR_INV_ENGINE);
@@ -425,9 +428,5 @@ _gpgme_parse_failure (char *args)
   if (where)
     *where = '\0';
 
-  where = args;
-  if (!strcmp (where, "gpg-exit"))
-    return 0;
-
   return atoi (which);
 }