Fix warnings in cmake module.
Fix warnings in cmake module.

cezarfx/zorba,28msec/zorba,cezarfx/zorba,28msec/zorba,28msec/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,cezarfx/zorba,bgarrels/zorba,cezarfx/zorba,cezarfx/zorba,28msec/zorba,28msec/zorba,bgarrels/zorba,bgarrels/zorba,bgarrels/zorba,bgarrels/zorba,cezarfx/zorba,28msec/zorba,cezarfx/zorba,cezarfx/zorba,28msec/zorba,28msec/zorba,bgarrels/zorba,bgarrels/zorba