Fix trivial compiler warnings

Test: Compile & executed many of the tests on Marlin
Change-Id: I2d88922c5dcc88de0394c5bfade02ca1dd9d7b60
Merged-In: I2d88922c5dcc88de0394c5bfade02ca1dd9d7b60
(cherry picked from commit 9c938487732de50adb46a2699ce930195c873ea1)
15 files changed