atl: Use the ARRAY_SIZE() macro.

dlls/atl/atl30.c

@@ -374,7 +374,7 @@ ATOM WINAPI AtlModuleRegisterWndClassInfoW(_ATL_MODULEW *pm, _ATL_WNDCLASSINFOW
         if (!wci->m_wc.lpszClassName)
         {
             static const WCHAR szFormat[] = {'A','T','L','%','0','8','l','x',0};
-            snprintfW(wci->m_szAutoName, sizeof(wci->m_szAutoName)/sizeof(WCHAR), szFormat, (UINT_PTR)wci);
+            snprintfW(wci->m_szAutoName, ARRAY_SIZE(wci->m_szAutoName), szFormat, (UINT_PTR)wci);
             TRACE("auto-generated class name %s\n", debugstr_w(wci->m_szAutoName));
             wci->m_wc.lpszClassName = wci->m_szAutoName;
         }

dlls/atl/atl_ax.c

@@ -1268,7 +1268,7 @@ static LPDLGTEMPLATEW AX_ConvertDialogTemplate(LPCDLGTEMPLATEW src_tmpl)
         if ( GET_WORD(tmp) == '{' ) /* all this mess created because of this line */
         {
             static const WCHAR AtlAxWin[] = {'A','t','l','A','x','W','i','n', 0};
-            PUT_BLOCK(AtlAxWin, sizeof(AtlAxWin)/sizeof(WCHAR));
+            PUT_BLOCK(AtlAxWin, ARRAY_SIZE(AtlAxWin));
             PUT_BLOCK(tmp, strlenW(tmp)+1);
         } else
             PUT_BLOCK(tmp, src-tmp);

dlls/atl/registrar.c

@@ -394,11 +394,11 @@ static HRESULT do_process_root_key(LPCOLESTR data, BOOL do_register)
             hres = DISP_E_EXCEPTION;
             break;
         }
-        for(i=0; i<sizeof(root_keys)/sizeof(root_keys[0]); i++) {
+        for(i=0; i<ARRAY_SIZE(root_keys); i++) {
             if(!lstrcmpiW(buf.str, root_keys[i].name))
                 break;
         }
-        if(i == sizeof(root_keys)/sizeof(root_keys[0])) {
+        if(i == ARRAY_SIZE(root_keys)) {
             WARN("Wrong root key name: %s\n", debugstr_w(buf.str));
             hres = DISP_E_EXCEPTION;
             break;