[gtk+] Fix build on C89 compilers

[Chun-wei Fan <fanchunwei src gnome org>]

commit da3198237938057a1b6cc3c5fb9cf50a31dbe640
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue May 28 13:36:54 2013 +0800

    Fix build on C89 compilers
    
    -Avoid defining variables in the middle of the block
    -Include fallback-c89.c in gtkrevealer.c in place of math.h as
     fallback-c89.c includes math.h itself, and is needed for round()

 gtk/gtkbookmarksmanager.c |    3 ++-
 gtk/gtkrevealer.c         |    3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkbookmarksmanager.c b/gtk/gtkbookmarksmanager.c
index c7eb026..f0cc53e 100644
--- a/gtk/gtkbookmarksmanager.c
+++ b/gtk/gtkbookmarksmanager.c
@@ -343,8 +343,9 @@ _gtk_bookmarks_manager_insert_bookmark (GtkBookmarksManager *manager,
 
   if (link)
     {
+      gchar *uri;
       bookmark = link->data;
-      gchar *uri = g_file_get_uri (bookmark->file);
+      uri = g_file_get_uri (bookmark->file);
 
       g_set_error (error,
                   GTK_FILE_CHOOSER_ERROR,
diff --git a/gtk/gtkrevealer.c b/gtk/gtkrevealer.c
index a9aa18d..a38d2c6 100644
--- a/gtk/gtkrevealer.c
+++ b/gtk/gtkrevealer.c
@@ -26,7 +26,8 @@
 #include "gtktypebuiltins.h"
 #include "gtkprivate.h"
 #include "gtkintl.h"
-#include <math.h>
+
+#include "fallback-c89.c"
 
 /**
  * SECTION:gtkrevealer