Avoid size_t to (u)int warnings with auto, where it is possible

Change-Id: I1ec7454ebce59d99bc828bfd5086907eb0905632
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/autotest/testresult.h

@@ -75,7 +75,7 @@ enum class ResultType {
     LAST_TYPE = Invalid
 };
 
-inline uint qHash(const ResultType &result)
+inline auto qHash(const ResultType &result)
 {
     return QT_PREPEND_NAMESPACE(qHash(int(result)));
 }