[BROWSEUI] Don't forget to CoInitializeEx on COM thread (reactos#5552)

Use CoInitializeEx and CoUninitialize in
CFindFolder::SearchThreadProc.
CORE-19110

Author: katahiromz

dll/win32/browseui/shellfind/CFindFolder.cpp

@@ -455,6 +455,8 @@ DWORD WINAPI CFindFolder::SearchThreadProc(LPVOID lpParameter)
 {
     _SearchData *data = static_cast<_SearchData*>(lpParameter);
 
+    HRESULT hrCoInit = CoInitializeEx(NULL, COINIT_MULTITHREADED);
+
     data->pFindFolder->NotifyConnections(DISPID_SEARCHSTART);
 
     UINT uTotalFound = RecursiveFind(data->szPath, data);
@@ -469,6 +471,9 @@ DWORD WINAPI CFindFolder::SearchThreadProc(LPVOID lpParameter)
     CloseHandle(data->hStopEvent);
     delete data;
 
+    if (SUCCEEDED(hrCoInit))
+        CoUninitialize();
+
     return 0;
 }