[lwip-devel] [bug #26273] etharp.c : fix alignment issue in etharp_raw

[Robert Sprowson]

Follow-up Comment #12, bug #26273 (project lwip):

Whether or not the compiler chooses to do inline copying or a call to memcpy
for structures is presumably a heuristic of the compiler.

For example, the ARM tools will look for structures less than 64 bytes and a
multiple of 4 long and that are word aligned and convert to load/store
multiple:

http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/ka3934.html

Don't change the code to work around compiler faults, but do change to code
for less ambiguous C.

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