[gnumeric] checks: please check argument of go_format_unref.

[Morten Welinder <mortenw src gnome org>]

commit abd6549a3e676a01676fc9c50941cf918dd69d2b
Author: Morten Welinder <terra gnome org>
Date:   Sat Nov 5 10:32:47 2011 -0400

    checks: please check argument of go_format_unref.

 src/graph.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/src/graph.c b/src/graph.c
index 54ab6a6..83b3f31 100644
--- a/src/graph.c
+++ b/src/graph.c
@@ -387,8 +387,7 @@ gnm_go_data_scalar_get_str (GODataScalar *dat)
 		scalar->val_str =
 			render_val (scalar_get_val (scalar), 0, 0, fmt, &ep);
 	}
-	if (fmt)
-		go_format_unref (fmt);
+	go_format_unref (fmt);
 	return scalar->val_str;
 }