Initialize _updateCallback to a null ptr.
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@ -32,7 +32,7 @@ class NTPClient {
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byte _packetBuffer[NTP_PACKET_SIZE];
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byte _packetBuffer[NTP_PACKET_SIZE];
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NTPUpdateCallbackFunction _updateCallback;
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NTPUpdateCallbackFunction _updateCallback = NULL;
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void sendNTPPacket();
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void sendNTPPacket();
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bool checkResponse();
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bool checkResponse();
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