COMP : fix compilation errors when OTB is compiled wihtout mapnick support
COMP : fix compilation errors when OTB is compiled wihtout mapnick support

orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB,orfeotoolbox/OTB