MqWebView: Make save file extension non-const in static funcs

Fixes:

      CC       src/marquee-web-view.o
    src/web-view.c: In function ‘save_type_changed_cb’:
    src/web-view.c:1010:12: warning: assignment discards ‘const’ qualifier from pointer target type
      extension = get_extension(name);
                ^
    src/web-view.c: In function ‘save_response_cb’:
    src/web-view.c:1060:14: warning: assignment discards ‘const’ qualifier from pointer target type
        extension = get_extension(filename);
                  ^

The "extension" variable of save_type_changed_cb() can't be made const
because the string to which it points is modified:

      CC       src/marquee-web-view.o
    src/web-view.c: In function ‘save_type_changed_cb’:
    src/web-view.c:1016:17: error: assignment of read-only location ‘*extension’
        extension[0] = '\0';  /* Remove extension. */
                     ^
    src/web-view.c:1024:17: error: assignment of read-only location ‘*extension’
        extension[0] = '\0';  /* Remove extension. */
                     ^

1 files changed, 3 insertions, 3 deletions

diff --git a/src/web-view.c b/src/web-view.c
index c5e76e8..74c9da6 100644
--- a/src/web-view.c
+++ b/src/web-view.c
@@ -919,10 +919,10 @@ save_mhtml_cb(WebKitWebView *web_view, GAsyncResult *result)
 	webkit_web_view_save_to_file_finish(web_view, result, NULL);
 }
 
-static const gchar *
-get_extension(const gchar *filename)
+static gchar *
+get_extension(gchar *filename)
 {
-	const gchar *extension;
+	gchar *extension;
 
 	extension = strrchr(filename, '.');
 	if (extension) {