qwt: convert tabs to spaces.
qwt: convert tabs to spaces.

Signed-off-by: Marc Reilly <d33c80bc45d65303e33ca83108a9952b745af9ef@cpdesign.com.au>

cpdesign/meta-openembedded,cpdesign/meta-openembedded,cpdesign/meta-openembedded,cpdesign/meta-openembedded,cpdesign/meta-openembedded