gdi: GetKerningPairs

[Huw D M Davies]

        Huw Davies <huw at codeweavers.com>
        If the last param of GetKerningPairs is NULL then return the
        number of pairs

diff --git a/dlls/gdi/font.c b/dlls/gdi/font.c
index f94bda1..e6a00a3 100644
--- a/dlls/gdi/font.c
+++ b/dlls/gdi/font.c
@@ -2467,6 +2467,10 @@ DWORD WINAPI GetKerningPairsW( HDC hDC, 
 {
     unsigned int i;
     FIXME("(%p,%ld,%p): almost empty stub!\n", hDC, cPairs, lpKerningPairs);
+
+    if(!lpKerningPairs) /* return the number of kerning pairs */
+        return 0;
+
     for (i = 0; i < cPairs; i++)
         lpKerningPairs[i].iKernAmount = 0;
     return 0;