FLUID makefile referenced LDFLAGS, but we only define CFLAGS and CXXFLAGS.
Fl_Browser::item_height() didn't handle blank lines (returned 2 for the
height). Also, didn't use textfont() when figuring out text height.
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.0@551 ea41ed52-d2ee-0310-a9c1-e6b18d33e121