printing char properly

src/observations.cpp

@@ -134,7 +134,7 @@ static void Observations::print(obsd_t& _obs)
   printArray<unsigned char, ARRAY_SIZE(_obs.code)>("\tcode: ", _obs.code);
   printArray<unsigned char, ARRAY_SIZE(_obs.qualL)>("\tqualL: ", _obs.qualL);
   printArray<unsigned char, ARRAY_SIZE(_obs.qualP)>("\tqualP: ", _obs.qualP);
-  printf("\tFreq. channel: %uc \n", _obs.freq);
+  printf("\tFreq. channel: %uc \n", (int)_obs.freq);
   printArray<double, ARRAY_SIZE(_obs.L)>("\tL: ", _obs.L);
   printArray<double, ARRAY_SIZE(_obs.P)>("\tP: ", _obs.P);
   printArray<float, ARRAY_SIZE(_obs.D)>("\tD: ", _obs.D);