Optional undefined behavior of memcpy

[amgross]

As described at #241 , it is undefined behavior to call memcpy with NULL pointer, even if length is 0.

erpc/erpcgen/src/templates/c_coders.template

Lines 66 to 73 in 6756f38

	{$indent}if (({$info.name} == NULL) && ({$info.sizeTemp} > 0))
	{$indent}{
	{$indent} codec->updateStatus(kErpcStatus_MemoryError);
	{$indent}}
	{$indent}else
	{$indent}{
	{$indent} memcpy({$info.name}, {$info.dataTemp}, {$info.sizeTemp});
	{$indent}}

Here, if {$info.name} is NULL and {$info.sizeTemp} is 0 this undefined behavior will be reached.

[amgross]

Seems like this issue is new from #72

[Hadatko]

Nice catch. You are right. I will fix this shortly and i will add issue that we can consider macro for checking parameter validation, or our own memcpy function implementation