Compile warnings

Author: pschatzmann

src/Driver.h

@@ -508,6 +508,8 @@ class AudioDriverCS43l22Class : public AudioDriver {
         return 44100; /*!< set to 44.1k samples per second */
       case RATE_48K:
         return 48000; /*!< set to 48k samples per second */
+      default:
+        break;
     }
     return 44100;
   }
@@ -522,6 +524,8 @@ class AudioDriverCS43l22Class : public AudioDriver {
         return OUTPUT_DEVICE_HEADPHONE;
       case DAC_OUTPUT_ALL:
         return OUTPUT_DEVICE_BOTH;
+      default:
+        break;
     }
     return OUTPUT_DEVICE_BOTH;
   }
@@ -1206,6 +1210,8 @@ class AudioDriverWM8978Class : public AudioDriver {
         return 0;
       case I2S_DSP:
         return 3;
+      default:
+        break;
     }
     return -1;
   }
@@ -1221,6 +1227,8 @@ class AudioDriverWM8978Class : public AudioDriver {
         return 2;
       case BIT_LENGTH_32BITS:
         return 3;
+      default:
+        break;
     }
     return -1;
   }

src/Driver/cs42448/cs42448.h

@@ -325,6 +325,9 @@ class CS42448 {
       case ADC_INPUT_ALL:
         ok_dac = setPowerADC(active);
         break;
+      default:
+        ok_dac = false;
+        break;
     }
     switch (codec_config.output_device) {
       case DAC_OUTPUT_NONE:
@@ -338,6 +341,9 @@ class CS42448 {
       case DAC_OUTPUT_ALL:
         ok_adc = setPowerDAC(active);
         break;
+      default:
+        ok_adc = false;
+        break;
     }
     return ok_adc && ok_dac;
   }