dpnet: Increase reported buffer size.

dlls/dpnet/peer.c

@@ -404,7 +404,7 @@ static HRESULT WINAPI IDirectPlay8PeerImpl_GetSPCaps(IDirectPlay8Peer *iface, co
     pdpspCaps->dwDefaultEnumTimeout = 1500;
     pdpspCaps->dwMaxEnumPayloadSize = 983;
     pdpspCaps->dwBuffersPerThread = 1;
-    pdpspCaps->dwSystemBufferSize = 8192;
+    pdpspCaps->dwSystemBufferSize = 0x10000;
 
     return DPN_OK;
 }

dlls/dpnet/tests/peer.c

@@ -140,7 +140,8 @@ static void test_get_sp_caps(void)
     ok(caps.dwDefaultEnumTimeout == 1500, "expected 1500, got %d\n", caps.dwDefaultEnumTimeout);
     ok(caps.dwMaxEnumPayloadSize == 983, "expected 983, got %d\n", caps.dwMaxEnumPayloadSize);
     ok(caps.dwBuffersPerThread == 1, "expected 1, got %d\n", caps.dwBuffersPerThread);
-    ok(caps.dwSystemBufferSize == 8192, "expected 8192, got %d\n", caps.dwSystemBufferSize);
+    ok(caps.dwSystemBufferSize == 0x10000 || broken(caps.dwSystemBufferSize == 0x2000 /* before Win8 */),
+       "expected 0x10000, got 0x%x\n", caps.dwSystemBufferSize);
 }
 
 static void test_cleanup_dp(void)