package/libb64: fix integer overflow and uninitialized C++ objects

Fixes a runtime bug on compilers where unsigned char is the default.
Fixes a runtime bug where _state variable in the encoder and decoder
c++ objects where not initialized by the constructors.

Signed-off-by: Mikael Eliasson <mikael@robomagi.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2 files changed