uxtheme: Fixed the todo blocks in the IsThemed tests when theming is inactive.

dlls/uxtheme/system.c

@@ -566,6 +566,7 @@ BOOL WINAPI IsAppThemed(void)
 BOOL WINAPI IsThemeActive(void)
 {
     TRACE("\n");
+    SetLastError(ERROR_SUCCESS);
     return bThemeActive;
 }
 

dlls/uxtheme/tests/system.c

@@ -85,7 +85,6 @@ static void test_IsThemed(void)
     SetLastError(0xdeadbeef);
     bThemeActive = pIsThemeActive();
     trace("Theming is %s\n", (bThemeActive) ? "active" : "inactive");
-    todo_wine
     ok( GetLastError() == ERROR_SUCCESS,
         "Expected ERROR_SUCCESS, got 0x%08x\n",
         GetLastError());
@@ -101,7 +100,6 @@ static void test_IsThemed(void)
         /* Although Wine currently returns FALSE, the logic behind it is wrong. It is not a todo_wine though in the testing sense */
         ok( bAppThemed == FALSE, "Expected FALSE as this test executable is not (yet) themed.\n");
 
-    todo_wine
     ok( GetLastError() == ERROR_SUCCESS,
         "Expected ERROR_SUCCESS, got 0x%08x\n",
         GetLastError());