[epiphany] Fix build warning

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 243639eb226bd65a5fc1c0b6fc1be1d2bd31c771
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Mon Oct 24 20:40:37 2016 -0500

    Fix build warning

 embed/ephy-web-view.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/embed/ephy-web-view.c b/embed/ephy-web-view.c
index 22c3788..483bbd8 100644
--- a/embed/ephy-web-view.c
+++ b/embed/ephy-web-view.c
@@ -1671,7 +1671,7 @@ static char *
 get_style_sheet (void)
 {
   GBytes *bytes;
-  const char *sheet;
+  char *sheet;
 
   bytes = g_resources_lookup_data (EPHY_PAGE_TEMPLATE_ERROR_CSS, 0, NULL);
   sheet = g_strdup (g_bytes_get_data (bytes, NULL));