bool improvements

Change-Id: I4e428e5d7093dbc8a1e7fd47ec49998ce143e5ac
bool improvements

Change-Id: I0dc09b7a6ee2849bd0c2ffc31be45f81cd2c15ee
cppuhelper: Let C++ inline functions return bool instead of sal_Bool

...to improve diagnosing misuses of boolean expressions in client code (cf.
compilerplugins/clang/implicitboolconversion.cxx).  This change should be
transparent to client code.

Change-Id: Ibed63566266328f84432ad2019e58265d9d30fc3