[gnome-builder] worker: invalid unix_pid returns -1, not zero.

[Ray Strode <halfline src gnome org>]

commit af71f1132cb65457d1adef884fbacc0399909d2a
Author: Boris Egorov <egorov linux com>
Date:   Mon Nov 2 20:58:38 2015 +0600

    worker: invalid unix_pid returns -1, not zero.
    
    70402f02e1c199b728188c51386d9aaedb737353 fixes only one of the two
    issues with g_credentials_get_unix_pid().
    
    Signed-off-by: Boris Egorov <egorov linux com>

 libide/ide-worker-process.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libide/ide-worker-process.c b/libide/ide-worker-process.c
index 38506af..dac6b1a 100644
--- a/libide/ide-worker-process.c
+++ b/libide/ide-worker-process.c
@@ -336,7 +336,7 @@ ide_worker_process_matches_credentials (IdeWorkerProcess *self,
 
   if ((self->subprocess != NULL) &&
       (identifier = g_subprocess_get_identifier (self->subprocess)) &&
-      (pid = g_credentials_get_unix_pid (credentials, NULL)))
+      (pid = g_credentials_get_unix_pid (credentials, NULL)) != -1)
     {
       str = g_strdup_printf ("%d", (int)pid);
       if (g_strcmp0 (identifier, str) == 0)