[librsvg] NULL check before dereference

[Christian Persch <chpe src gnome org>]

commit dccf2281f56d893551bf8ba76ce6e131ea66c749
Author: Christian Persch <chpe gnome org>
Date:   Sun Nov 27 21:40:23 2011 +0100

    NULL check before dereference
    
    ... not afterwards!

 rsvg-filter.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/rsvg-filter.c b/rsvg-filter.c
index cfc575c..4d4d0d3 100644
--- a/rsvg-filter.c
+++ b/rsvg-filter.c
@@ -672,7 +672,7 @@ rsvg_filter_get_result (GString * name, RsvgFilterContext * ctx)
         output.surface = cairo_surface_reference (rsvg_filter_get_bg (ctx));
         output.Rused = output.Gused = output.Bused = output.Aused = 1;
         return output;
-    } else if (!strcmp (name->str, "") || !strcmp (name->str, "none") || !name) {
+    } else if (!name || !strcmp (name->str, "") || !strcmp (name->str, "none")) {
         output = ctx->lastresult;
         cairo_surface_reference (output.surface);
         return output;