Fix a buffer overflow.

The 6 byte logbook entry gets prepended to the profile data. We need to
take this into account when allocating the memory buffer. Under normal
circumstances this shouldn't be a problem, because a single dive is
usually much smaller than the profile ringbuffer. But it's better to be
on the safe side.

src/diverite_nitekq.c

@@ -372,7 +372,7 @@ diverite_nitekq_extract_dives (dc_device_t *abstract, const unsigned char data[]
 	data += SZ_PACKET;
 
 	// Allocate memory.
-	unsigned char *buffer = (unsigned char *) malloc (RB_PROFILE_END - RB_PROFILE_BEGIN);
+	unsigned char *buffer = (unsigned char *) malloc (SZ_LOGBOOK + RB_PROFILE_END - RB_PROFILE_BEGIN);
 	if (buffer == NULL) {
 		ERROR (context, "Failed to allocate memory.");
 		return DC_STATUS_NOMEMORY;