tests: The non-gcc case was missing a forward declaration for winetest_skip().

[Francois Gouget]

---

In particular this fixes a bunch of warnings when compiling with Visual 
C++.

 include/wine/test.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/include/wine/test.h b/include/wine/test.h
index 4f2e863..f4557ab 100644
--- a/include/wine/test.h
+++ b/include/wine/test.h
@@ -76,6 +76,7 @@ extern void winetest_trace( const char *msg, ... ) __attribute__((format (printf
 #else /* __GNUC__ */
 
 extern int winetest_ok( int condition, const char *msg, ... );
+extern void winetest_skip( const char *msg, ... );
 extern void winetest_trace( const char *msg, ... );
 
 #endif /* __GNUC__ */
-- 
1.4.4.3