Feature/integ fix2 (#72)

* fix compilation issues

* second set of small fixes

include/platform/atomic.h

@@ -55,7 +55,7 @@ extern "C" {
 /**
  * Begin critical section.
  */
-uint32_t otPlatAtomicBegin();
+uint32_t otPlatAtomicBegin(void);
 
 /**
  * End critical section.

include/platform/radio.h

@@ -162,7 +162,7 @@ ThreadError otPlatRadioSetShortAddress(uint16_t aShortAddress);
 /**
  * Intialize the radio.
  */
-void otPlatRadioInit();
+void otPlatRadioInit(void);
 
 /**
  * Enable the radio.

include/platform/serial.h

@@ -113,7 +113,7 @@ const uint8_t *otPlatSerialGetReceivedBytes(uint16_t *aBufLength);
 /**
  * Release received bytes.
  */
-void otPlatSerialHandleReceiveDone();
+void otPlatSerialHandleReceiveDone(void);
 
 /**
  * @}