[WARNINGFIX][io] rather have a -Wcast-qual than a conversion warning
[WARNINGFIX][io] rather have a -Wcast-qual than a conversion warning

Change-Id: Iaa04d7736ebd7674489a199f6322f6fbf45d4e6e

Parrot-Developers/fusion,ncarrier/fusion,Parrot-Developers/fusion,ncarrier/fusion