txdata: fix cpp check warning

Author: cujomalainey

src/TX/ANT_AntRequest.h

@@ -1,6 +1,7 @@
 #ifndef ANT_ANTREQUEST_h
 #define ANT_ANTREQUEST_h
 #include <inttypes.h>
+#include <stddef.h>
 #include <ANT_defines.h>
 
 /**

src/TX/ANT_AntTxDataRequest.cpp

@@ -1,8 +1,6 @@
 #include <TX/ANT_AntTxDataRequest.h>
 
-AntTxDataRequest::AntTxDataRequest(uint8_t msgId) : AntRequest(msgId) {
-
-}
+AntTxDataRequest::AntTxDataRequest(uint8_t msgId) : AntRequest(msgId) {}
 
 void AntTxDataRequest::setDataBuffer(uint8_t* dataPtr) {
     _data = dataPtr;

src/TX/ANT_AntTxDataRequest.h

@@ -10,7 +10,7 @@
  */
 class AntTxDataRequest : public AntRequest {
 public:
-    AntTxDataRequest(uint8_t msgId);
+    explicit AntTxDataRequest(uint8_t msgId);
     /**
      * Returns a pointer to the buffer
      */
@@ -28,8 +28,8 @@ class AntTxDataRequest : public AntRequest {
     void setDataLength(uint8_t length);
 
 private:
-    uint8_t* _data;
-    uint8_t  _dataLength;
+    uint8_t* _data = NULL;
+    uint8_t  _dataLength = 0;
 };
 
 #endif // ANT_ANTTXDATAREQUEST_h