[gnome-builder] foundry: silence warning

[Christian Hergert <chergert src gnome org>]

commit 46743f738cbd20fce0208b16a0e3ad256df2b3a0
Author: Christian Hergert <chergert redhat com>
Date:   Wed Feb 17 14:12:41 2021 -0800

    foundry: silence warning

 src/libide/foundry/ide-pipeline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/libide/foundry/ide-pipeline.c b/src/libide/foundry/ide-pipeline.c
index 3ff848c61..1300eba32 100644
--- a/src/libide/foundry/ide-pipeline.c
+++ b/src/libide/foundry/ide-pipeline.c
@@ -662,7 +662,7 @@ extract_directory_change (IdePipeline  *self,
     return FALSE;
 
   len = &data[len - 1] - begin;
-  dir = g_strndup (begin, len);
+  dir = g_strndup ((gchar *)begin, len);
 
   if (g_utf8_validate (dir, len, NULL))
     {