winhttp: Prevent console spamming in get_system_proxy_autoconfig_url.

[Jeremy Audiger]

When Battle.net is installing, I got a spam in the console from this function. This fix prevents it.

Signed-off-by: Jérémy Audiger <audiger at live.fr>
---
 dlls/winhttp/session.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/dlls/winhttp/session.c b/dlls/winhttp/session.c
index 28587f5..30909ff 100644
--- a/dlls/winhttp/session.c
+++ b/dlls/winhttp/session.c
@@ -1351,7 +1351,14 @@ static BOOL get_system_proxy_autoconfig_url( char *buf, DWORD buflen )
     CFRelease( settings );
     return ret;
 #else
-    FIXME( "no support on this platform\n" );
+    static BOOL first = TRUE;
+    if (first)
+    {
+        FIXME( "no support on this platform\n" );
+        first = FALSE;
+    }
+    else
+        TRACE( "no support on this platform\n" );
     return FALSE;
 #endif
 }
-- 
2.7.4