add BLTouch-related messages in english and (rusty) french;
add missing endstops.h in ultralcd.cpp;
fix misc. compiler warnings;
fix lsf_reset - ZERO macro can't handle a pointer as it would only memset the size of the pointer, not the size of the entire struct
* Correct over optimization of pre-initialized variables
NEAR_ZERO() works most of the time... But it leaves corner cases
uncovered. We need to explicitly check if these variables are +/-
infinity.
* Correct over optimization of pre-initialized variables
Pretty much... The code is in place. Still more work to do. But it
has a lot of hooks and variables in other code, so commit and merge
before I pick up a million 'Conflicts'.
