BUG: C++ bool is 4 bytes on osx ppc

Use unsigned int for the bool type in OpenJPEG2000 on osx ppc in C.

Change-Id: I1bbaddd0600b9769549834c8cc90d64b38242e2a
Merge topic 'OpenJPEG2000BoolPCC'

fa76387 BUG: C++ bool is 4 bytes on osx ppc