Fix UB in QVariant::canConvert()

'currentType' was not sanitized before being used as a shift.

Fix by checking for a valid shift amount before shifting.
Also change the shifted value from 1 (int) to 1U (uint).
It's just the right thing to do.

Found by UBSan:
    qtbase/src/corelib/kernel/qvariant.cpp:3131:59: runtime error: shift exponent 1114 is too large for 32-bit type 'unsigned int'

Change-Id: Id3910d6d7f166fd7c80adf5ce1699f0eeb453562
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

0 files changed, 0 insertions, 0 deletions