Some small fixes
- bochs.h:     fixed gcc 4.8 warning
- config.h.in: fixed newline
- extplugin.h: fixed VS2008Ex plugins compilation
- gui.cc:      fixed tooltip


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11925 6c8e4198-a580-4521-a02f-c9ae86df1db9