[vdr] strange cPalette::SetBpp

[Markus Hahn]

Hi there, 
with none default themes, I get the error messages 
like: 
"too many different colors used in palette"
by using 16 different colors in theme file.
As a result some Skins.Message are not displayed 

Digging deeper, I found cPalette::SetBpp  osd.c
give some strange values: 
At Start
maxColors: 256
maxColors: 2
maxColors: 256
maxColors: 4
first call up menu 
maxColors: 16
maxColors: 4

etc. 

Why does the color resolution changed? Shoudn`t be at one value? 

regards Markus