Windows: Fix potential accessibility related leaks

modules/juce_gui_basics/native/accessibility/juce_UIAGridItemProvider_windows.h

@@ -93,12 +93,12 @@ public:
 
                         if (isPositiveAndBelow (column->begin, children.size()))
                         {
-                            IRawElementProviderSimple* provider = nullptr;
+                            ComSmartPtr<IRawElementProviderSimple> provider;
 
                             if (auto* child = children[(size_t) column->begin])
                             {
                                 JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wlanguage-extension-token")
-                                if (child->getNativeImplementation()->QueryInterface (IID_PPV_ARGS (&provider)) == S_OK && provider != nullptr)
+                                if (child->getNativeImplementation()->QueryInterface (IID_PPV_ARGS (provider.resetAndGetPointerAddress())) == S_OK && provider != nullptr)
                                 {
                                     *pRetVal = SafeArrayCreateVector (VT_UNKNOWN, 0, 1);
                                     LONG index = 0;

modules/juce_gui_basics/native/accessibility/juce_UIAGridProvider_windows.h

@@ -99,11 +99,11 @@ public:
 
                 for (const auto& child : children)
                 {
-                    IRawElementProviderSimple* provider = nullptr;
+                    ComSmartPtr<IRawElementProviderSimple> provider;
 
                     JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wlanguage-extension-token")
                     if (child != nullptr)
-                        child->getNativeImplementation()->QueryInterface (IID_PPV_ARGS (&provider));
+                        child->getNativeImplementation()->QueryInterface (IID_PPV_ARGS (provider.resetAndGetPointerAddress()));
                     JUCE_END_IGNORE_WARNINGS_GCC_LIKE
 
                     if (provider == nullptr)