msctf: Don't crash on NULL input in EnumLanguageProfiles().

dlls/msctf/inputprocessor.c

@@ -617,6 +617,10 @@ static HRESULT WINAPI InputProcessorProfiles_EnumLanguageProfiles(
 {
     InputProcessorProfiles *This = impl_from_ITfInputProcessorProfiles(iface);
     TRACE("(%p) %x %p\n",This,langid,ppEnum);
+
+    if (!ppEnum)
+        return E_INVALIDARG;
+
     return EnumTfLanguageProfiles_Constructor(langid, ppEnum);
 }
 

dlls/msctf/tests/inputprocessor.c

@@ -973,6 +973,11 @@ static void test_EnumLanguageProfiles(void)
 {
     BOOL found = FALSE;
     IEnumTfLanguageProfiles *ppEnum;
+    HRESULT hr;
+
+    hr = ITfInputProcessorProfiles_EnumLanguageProfiles(g_ipp, gLangid, NULL);
+    ok(hr == E_INVALIDARG, "EnumLanguageProfiles failed: %x\n", hr);
+
     if (SUCCEEDED(ITfInputProcessorProfiles_EnumLanguageProfiles(g_ipp,gLangid,&ppEnum)))
     {
         TF_LANGUAGEPROFILE profile;