hardcoding certain gcc optimizations in QwtColorMap


git-svn-id: svn://svn.code.sf.net/p/qwt/code/trunk@2106 29e17f8d-cf37-471e-a288-72cc03a76eda
alpha value for HSV based color maps added


git-svn-id: svn://svn.code.sf.net/p/qwt/code/trunk@2108 29e17f8d-cf37-471e-a288-72cc03a76eda
invalidating the cache when changing the color table of a spectrogram


git-svn-id: svn://svn.code.sf.net/p/qwt/code/trunk@2109 29e17f8d-cf37-471e-a288-72cc03a76eda
doxygen fixes


git-svn-id: svn://svn.code.sf.net/p/qwt/code/trunk@2110 29e17f8d-cf37-471e-a288-72cc03a76eda
compiler warning fixed


git-svn-id: svn://svn.code.sf.net/p/qwt/code/trunk@2113 29e17f8d-cf37-471e-a288-72cc03a76eda