shell32/tests: Fix some leaks in tests (Valgrind).

dlls/shell32/tests/shfldr_special.c

@@ -162,8 +162,11 @@ if (0)
     hr = IShellFolder2_GetDefaultColumnState(folder, 6, &state);
     ok(broken(hr == E_NOTIMPL) || hr == E_INVALIDARG /* Win7 */, "got 0x%08x\n", hr);
 
+    details.str.u.pOleStr = NULL;
     hr = IShellFolder2_GetDetailsOf(folder, NULL, 0, &details);
     ok(hr == S_OK || broken(E_NOTIMPL) /* W2K */, "got 0x%08x\n", hr);
+    if (SHELL_OsIsUnicode()) SHFree(details.str.u.pOleStr);
+
     /* test every column if method is implemented */
     if (hr == S_OK)
     {

dlls/shell32/tests/shlfolder.c

@@ -3977,6 +3977,7 @@ static void r_verify_pidl(unsigned l, LPCITEMIDLIST pidl, const WCHAR *path)
             ok_(__FILE__,l)(lstrcmpW(path, U(filename).pOleStr) == 0,
                     "didn't get expected path (%s), instead: %s\n",
                      wine_dbgstr_w(path), wine_dbgstr_w(U(filename).pOleStr));
+            SHFree(U(filename).pOleStr);
         }else if(filename.uType == STRRET_CSTR){
             ok_(__FILE__,l)(strcmp_wa(path, U(filename).cStr) == 0,
                     "didn't get expected path (%s), instead: %s\n",

dlls/shell32/tests/shlview.c

@@ -1105,6 +1105,7 @@ static void test_GetSetCurrentViewMode(void)
         skip("No IFolderView for the desktop folder.\n");
     }
 
+    IShellBrowser_Release(browser);
     IShellView_DestroyViewWindow(sview);
     IShellView_Release(sview);
     IShellFolder_Release(desktop);