Fix a couple of compiler warnings.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@1931 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/include/vg_skin.h b/include/vg_skin.h
index faf5d72..ba16315 100644
--- a/include/vg_skin.h
+++ b/include/vg_skin.h
@@ -434,6 +434,7 @@
 /* Nb: VG_(rename)() declared in stdio.h section above */
 extern Int  VG_(unlink) ( Char* file_name );
 extern Int  VG_(stat)   ( Char* file_name, struct vki_stat* buf );
+extern Int  VG_(fstat)  ( Int   fd,        struct vki_stat* buf );
 
 extern Char* VG_(getcwd) ( Char* buf, Int size );