[ImageResizer]Fix use without initializing warn

src/modules/imageresizer/ImageResizerContextMenu/dllmain.cpp

@@ -255,14 +255,20 @@ private:
             for (DWORD i = 0; i < fileCount; i++)
             {
                 IShellItem* shellItem;
-                psiItemArray->GetItemAt(i, &shellItem);
-                LPWSTR itemName;
-                // Retrieves the entire file system path of the file from its shell item
-                shellItem->GetDisplayName(SIGDN_FILESYSPATH, &itemName);
-                CString fileName(itemName);
-                fileName.Append(_T("\r\n"));
-                // Write the file path into the input stream for image resizer
-                writePipe.Write(fileName, fileName.GetLength() * sizeof(TCHAR));
+                HRESULT getItemAtResult = psiItemArray->GetItemAt(i, &shellItem);
+                if (SUCCEEDED(getItemAtResult))
+                {
+                    LPWSTR itemName;
+                    // Retrieves the entire file system path of the file from its shell item
+                    HRESULT getDisplayResult = shellItem->GetDisplayName(SIGDN_FILESYSPATH, &itemName);
+                    if (SUCCEEDED(getDisplayResult))
+                    {
+                        CString fileName(itemName);
+                        fileName.Append(_T("\r\n"));
+                        // Write the file path into the input stream for image resizer
+                        writePipe.Write(fileName, fileName.GetLength() * sizeof(TCHAR));
+                    }
+                }
             }
             writePipe.Close();
         }

src/modules/imageresizer/dll/ContextMenuHandler.cpp

@@ -386,8 +386,14 @@ HRESULT __stdcall CContextMenuHandler::GetState(IShellItemArray* psiItemArray, B
     PERCEIVED type;
     PERCEIVEDFLAG flag;
     IShellItem* shellItem;
+
     //Check extension of first item in the list (the item which is right-clicked on)
-    psiItemArray->GetItemAt(0, &shellItem);
+    HRESULT getItemAtResult = psiItemArray->GetItemAt(0, &shellItem);
+    if(!SUCCEEDED(getItemAtResult)) {
+        // Avoid crashes in the following code.
+        return E_FAIL;
+    }
+
     LPTSTR pszPath;
     // Retrieves the entire file system path of the file from its shell item
     HRESULT getDisplayResult = shellItem->GetDisplayName(SIGDN_FILESYSPATH, &pszPath);