Genie:  Tighten up a string access

Since we're already taking size() anyway, write s[ size - 1 ] instead of
*(s.end() - 1).  It's more readable, slightly shorter, fewer operations,
and the string subscript is slightly faster than end().
Genie:  Silence logical-op-parentheses warnings
Genie:  Silence bitwise-op-parentheses warnings
Vertice:  Silence bitwise-op-parentheses warnings
Pedestal:  Silence logical-op-parentheses warning
A-line: Silence logical-op-parentheses warning
local-edit-client:  Silence bitwise-op-parentheses
v68k:  Silence logical-op-parentheses warnings
v68k:  Silence bitwise-op-parentheses warnings
sh:  Silence clang logical-op-parentheses warnings
Merge branch 'parentheses'
Pedestal:  Silence assignment-in-condition warning
recall:  Silence missing-return-value in GCC asm
recall:  Skip a frame on x86 for ppc consistency