Fix for compilation warning

Change-Id: I7c7df29d3f43653c2ba92e03be603f42b13e0c03
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
Reviewed-on: https://git.eclipse.org/r/c/jdt/eclipse.jdt.core/+/183375
Tested-by: JDT Bot <jdt-bot@eclipse.org>