wtsapi32: Quiet a couple of noisy FIXME's.

dlls/wtsapi32/wtsapi32.c

@@ -120,7 +120,9 @@ BOOL WINAPI WTSEnumerateServersW(LPWSTR pDomainName, DWORD Reserved, DWORD Versi
 BOOL WINAPI WTSEnumerateSessionsA(HANDLE hServer, DWORD Reserved, DWORD Version,
     PWTS_SESSION_INFOA* ppSessionInfo, DWORD* pCount)
 {
-    FIXME("Stub %p 0x%08x 0x%08x %p %p\n", hServer, Reserved, Version,
+    static int once;
+
+    if (!once++) FIXME("Stub %p 0x%08x 0x%08x %p %p\n", hServer, Reserved, Version,
           ppSessionInfo, pCount);
 
     if (!ppSessionInfo || !pCount) return FALSE;
@@ -153,7 +155,9 @@ BOOL WINAPI WTSEnumerateSessionsW(HANDLE hServer, DWORD Reserved, DWORD Version,
  */
 void WINAPI WTSFreeMemory(PVOID pMemory)
 {
-    FIXME("Stub %p\n", pMemory);
+    static int once;
+
+    if (!once++) FIXME("Stub %p\n", pMemory);
 }
 
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