sys: remove break after return
Merge pull request #1661 from N8Fear/duplicate

lint: remove break after return
board/sys: move bounds check before array access
lint: lpc1768/msp430: remove arith ops on void ptrs
cpu: arm/cortex-mX/atmega: use uintptr_t for sp cast
Merge pull request #1663 from N8Fear/arrayIndexCheck

lint: fix array indices being used before limit check
cpu: multiple: change size_t to ptrdiff_t for_sbrk_r
Merge pull request #1662 from N8Fear/void_ptr_arith

lint: lpc1768/msp430: remove arith ops on void ptrs
Merge pull request #1664 from N8Fear/unsignedLessThanZero

lint: _sbrk_r: change parameter type from size_t to ptrdiff_t