[gegl] tools: fix NULL dereference in op doc generator

[Ãyvind KolÃs <ok src gnome org>]

commit 742bd2a74145ab9e8627cc8fefd8de12a1b7ac24
Author: Ãyvind KolÃs <pippin gimp org>
Date:   Sat Mar 31 01:59:30 2012 +0100

    tools: fix NULL dereference in op doc generator

 tools/operation_reference.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/tools/operation_reference.c b/tools/operation_reference.c
index 848fbec..d9687a6 100644
--- a/tools/operation_reference.c
+++ b/tools/operation_reference.c
@@ -218,7 +218,8 @@ list_properties (GType    type,
           g_print("<td class='prop_name' valign='top'>%s</td>\n",
             g_param_spec_get_name (self[prop_no]));
 
-          if (g_param_spec_get_blurb (self[prop_no])[0]!='\0')
+          if (g_param_spec_get_blurb (self[prop_no]) &&
+              g_param_spec_get_blurb (self[prop_no])[0]!='\0')
             g_print ("<td colspan='1' valign='top' class='prop_blurb'>%s</td>\n",
             g_param_spec_get_blurb (self[prop_no]));
           else