oma-lwm2m: Handle text/plain floatfix numbers without decimal point
oma-lwm2m: Handle text/plain floatfix numbers without decimal point

Fixes bug: If no decimal point is present then the entire number is
treated as the decimal part instead of the integer part

arurke/contiki,MohamedSeliem/contiki,arurke/contiki,arurke/contiki,MohamedSeliem/contiki,MohamedSeliem/contiki,MohamedSeliem/contiki,arurke/contiki,MohamedSeliem/contiki,MohamedSeliem/contiki,MohamedSeliem/contiki,arurke/contiki,arurke/contiki,arurke/contiki