lwip: Fix a few more CLANG alignment warnings - clang warns although the target struct is packed (and may therefore be unaligned) :-(
lwip: Fix a few more CLANG alignment warnings - clang warns although the target struct is packed (and may therefore be unaligned) :-(

Upstream commit: e40175ef059b7122f650774b1ce95ee71e99c1e9

ambrop72/aprinter,johnkingsley/aprinter,ambrop72/aprinter,johnkingsley/aprinter,johnkingsley/aprinter,ambrop72/aprinter,johnkingsley/aprinter,ambrop72/aprinter,johnkingsley/aprinter,ambrop72/aprinter,johnkingsley/aprinter,ambrop72/aprinter,ambrop72/aprinter,johnkingsley/aprinter