V4: Fix compilation failure on BB10 x86 and QNX6 x86

This change amends ddb33ee9ba9e1344caa9be5dbf4b534c3ede692e

Task-number: QTBUG-39274
Change-Id: If0c3bc1204433315b9329229304db7ddadc785f2
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>