QByteArrayMatcher: fix undefined shift

The REHASH macro is used in qFindByteArray() with a char argument.
Applying the shift operator promotes (a) to int. The check in
REHASH, however, checks for the shift being permissible for
_unsigned_ ints.

Since hashHaystack is a uint, too, rectify by casting (a) to
uint prior to shifting.

Found by UBSan:

  src/corelib/tools/qbytearraymatcher.cpp:314:72: runtime error: left shift of 34 by 30 places cannot be represented in type 'int'

Change-Id: Id09c037d570ca70b49f87ad22bed31bbb7dcc7fb
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>

0 files changed, 0 insertions, 0 deletions