msi: Return ERROR_INVALID_PARAMETER if the product list is empty and index is not zero.

dlls/msi/registry.c

@@ -1327,6 +1327,10 @@ UINT WINAPI MsiEnumClientsW(LPCWSTR szComponent, DWORD index, LPWSTR szProduct)
     if (r != ERROR_SUCCESS)
     {
         RegCloseKey(hkeyComp);
+
+        if (index != 0)
+            return ERROR_INVALID_PARAMETER;
+
         return ERROR_UNKNOWN_COMPONENT;
     }
 

dlls/msi/tests/msi.c

@@ -1649,10 +1649,7 @@ static void test_MsiEnumClients(void)
     /* index > 0, no products exist */
     product[0] = '\0';
     r = MsiEnumClientsA(component, 1, product);
-    todo_wine
-    {
     ok(r == ERROR_INVALID_PARAMETER, "Expected ERROR_INVALID_PARAMETER, got %d\n", r);
-    }
     ok(!lstrcmpA(product, ""), "Expected product to be unchanged, got %s\n", product);
 
     res = RegSetValueExA(compkey, prod_squashed, 0, REG_SZ, (const BYTE *)"C:\\imapath", 10);
@@ -1722,10 +1719,7 @@ static void test_MsiEnumClients(void)
     /* index > 0, no products exist */
     product[0] = '\0';
     r = MsiEnumClientsA(component, 1, product);
-    todo_wine
-    {
     ok(r == ERROR_INVALID_PARAMETER, "Expected ERROR_INVALID_PARAMETER, got %d\n", r);
-    }
     ok(!lstrcmpA(product, ""), "Expected product to be unchanged, got %s\n", product);
 
     res = RegSetValueExA(compkey, prod_squashed, 0, REG_SZ, (const BYTE *)"C:\\imapath", 10);