[nautilus] Ensure range checking works below zero

[Alexander Larsson <alexl src gnome org>]

commit 7a890c3f5adb8eb35e208958b293e03c691c7830
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Nov 19 12:45:18 2009 +0100

    Ensure range checking works below zero
    
    We add an int to an unsigned and then check for underflow, but
    this check will never trigger for unsigned variables like an enum.
    We fix this by using a signed value for the addition result.

 src/file-manager/fm-list-view.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/file-manager/fm-list-view.c b/src/file-manager/fm-list-view.c
index 902f242..f24d30a 100644
--- a/src/file-manager/fm-list-view.c
+++ b/src/file-manager/fm-list-view.c
@@ -2418,7 +2418,7 @@ static void
 fm_list_view_bump_zoom_level (FMDirectoryView *view, int zoom_increment)
 {
 	FMListView *list_view;
-	NautilusZoomLevel new_level;
+	gint new_level;
 
 	g_return_if_fail (FM_IS_LIST_VIEW (view));