Count digits in QDateTimeParser::parseSection()'s numeric fields

Assuming everything up to the first space is a digit is not sound.

Change-Id: Iab5bb134c8e3299da726625c53b6a9b23f09dbb4
Reviewed-by: Andreas Buhr <andreas.buhr@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/time/qdatetimeparser.cpp

@@ -816,7 +816,7 @@ QDateTimeParser::parseSection(const QDateTime &currentValue, int sectionIndex,
             result = ParsedSection(Intermediate);
         } else {
             for (int i = 0; i < sectiontextSize; ++i) {
-                if (sectionTextRef.at(i).isSpace())
+                if (!sectionTextRef.at(i).isDigit())
                     sectiontextSize = i; // which exits the loop
             }