ws2_32: Make function declarations match definitions

[Andrew Talbot]

Changelog:
    ws2_32: Match function declarations with definitions.

diff --git a/dlls/ws2_32/async.c b/dlls/ws2_32/async.c
index 963ed66..019f73f 100644
--- a/dlls/ws2_32/async.c
+++ b/dlls/ws2_32/async.c
@@ -126,8 +126,8 @@ CRITICAL_SECTION csWSgetXXXbyYYY = { &critsect_debug, -1, 0, 0, 0, 0 };
 
 /* protoptypes of some functions in socket.c
  */
-UINT16 wsaErrno(void);
-UINT16 wsaHerrno(int errnr);
+UINT wsaErrno(void);
+UINT wsaHerrno(int errnr);
 
 #define AQ_WIN16	0x00
 #define AQ_WIN32	0x04