warning: 'cksm' may be used uninitialized

[stevstrong]

Hello,

by porting this lib to STM32 I have the mentioned warning generated by the compiler at this place:

avr-tcpip-lite-enc28j60-solution/enc28j60-avr-tcpserver.X/mcc_generated_files/ethernet/src/enc28j60.c

Lines 1178 to 1207 in 38232b9

	uint32_t cksm;
	// cksm = seed;
	position += sizeof(Control_Byte);
	while ((ENC28_Rcr8(J60_ECON1) & 0x20) != 0); // Waits until the DMAST bit is clear
	ENC28_Wcr16(J60_EDMASTL, (pHead->packetStart + position));
	ENC28_Wcr16(J60_EDMANDL, pHead->packetStart + position + (length - 1));
	if (!(ENC28_Rcr8(J60_ECON1) & 0x10)) // Verify CSUMEN is not set already
	{
	// Sets CSUMEN and DMAST to select and start a checksum operation
	ENC28_Bfs(J60_ECON1, 0x30);
	while ((ENC28_Rcr8(J60_ECON1) & 0x20) != 0); // Waits until the DMAST bit is clear
	ENC28_Bfc(J60_ECON1,0x10);
	cksm = ENC28_Rcr16(J60_EDMACSL);
	if (seed)
	{
	seed = ~(seed);
	cksm += seed;
	while (cksm >> 16)
	{
	cksm = (cksm & 0x0FFFF) + (cksm >> 16);
	}
	}
	cksm = htons(cksm);
	}
	return (uint16_t)cksm;

Indeed, it looks like for the false case of line 1188 the variable cksm will remain uninitialized.
I could set it to 0 at declaration time (in line 1178), but what would actually be the right solution?