Initialize rbOffsetArray. Probably redundant?

Author: PaulZC

Firmware/RTK_Everywhere/RTK_Everywhere.ino

@@ -479,7 +479,7 @@ const int btReadTaskStackSize = 4000;
 // Array of start-of-sentence offsets into the ring buffer
 #define AMOUNT_OF_RING_BUFFER_DATA_TO_DISCARD (settings.gnssHandlerBufferSize >> 2)
 #define AVERAGE_SENTENCE_LENGTH_IN_BYTES 32
-RING_BUFFER_OFFSET *rbOffsetArray;
+RING_BUFFER_OFFSET *rbOffsetArray = nullptr;
 uint16_t rbOffsetEntries;
 
 uint8_t *ringBuffer; // Buffer for reading from F9P. At 230400bps, 23040 bytes/s. If SD blocks for 250ms, we need 23040