[Libreoffice] [PATCH] Replace getLength() with isEmpty() in vcl/generic/fontmanager

[Chr. Rossmanith]

Hi,

while replacing ByteString with OString I came across some getLength() 
calls which might be replaced with isEmpty(). Hope Olivier won't be 
annoyed  :-)

Some reviewing would be nice to be sure the logic didn't get inverted 
accidently.I have git push access - so reviewing would be sufficient.

Christina