Function prototype to support 64-bit

Missing a prototype can cause a problem if we are 64-bit and the
function is returning a pointer.  Add a prototype to stop the return
value from being corrupted.

Author: dkulwin

auth2-pubkey.c

@@ -86,7 +86,8 @@ extern u_int session_id2_len;
 #ifdef WIN32_FIXME
 
   extern char HomeDirLsaW[MAX_PATH];
-  
+  wchar_t *GetHomeDir(char *userName);
+
 #endif