[gdk-pixbuf] tests: Allow a potential error to be shown before failing

[Tobias Mueller <tobiasmue src gnome org>]

commit 62c498a3432ef0e161dec04e8af6b398ba3bec4b
Author: Tobias Mueller <muelli cryptobitch de>
Date:   Tue Aug 1 23:01:51 2017 +0100

    tests: Allow a potential error to be shown before failing
    
    When the test fails, let's first give it the chance to print the error
    message in order to help debugging failures.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786259

 tests/pixbuf-short-gif-write.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/tests/pixbuf-short-gif-write.c b/tests/pixbuf-short-gif-write.c
index 9e7137a..82150d9 100644
--- a/tests/pixbuf-short-gif-write.c
+++ b/tests/pixbuf-short-gif-write.c
@@ -16,6 +16,8 @@ loader_write_from_channel (GdkPixbufLoader *loader,
     gsize bytes_read = 0;
     GIOStatus read_status;
     GError* error = NULL;
+    gboolean ret;
+    
     if(count_bytes < G_MAXSIZE) {
         //read no more than 'count_bytes' bytes
         buffer = g_malloc (count_bytes);
@@ -26,8 +28,9 @@ loader_write_from_channel (GdkPixbufLoader *loader,
     }
     g_assert (read_status == G_IO_STATUS_NORMAL || read_status == G_IO_STATUS_EOF);
 
-    g_assert (gdk_pixbuf_loader_write(loader, buffer, bytes_read, &error));
+    ret = gdk_pixbuf_loader_write(loader, buffer, bytes_read, &error);
     g_assert_no_error (error);
+    g_assert (ret);
     g_free(buffer);
     return bytes_read;
 }