qdirectfbblitter.cpp:146: error: narrowing conversion of 'srcRect.x()'
from 'qreal' to 'int' inside { }
qdirectfbblitter.cpp:152: error: narrowing conversion of 'rect.x()' from
'qreal' to 'int' inside { }

The same error exists for calls to y(), width(), and height() at both
locations.

Change-Id: I14f165a6a1cab9502e157e798157b835faf2300f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>