set cmake's default build type if empty
set cmake's default build type if empty

libkml/libkml,rashadkm/libkml,libkml/libkml,libkml/libkml,rashadkm/libkml,rashadkm/libkml,libkml/libkml,libkml/libkml,rashadkm/libkml,rashadkm/libkml