SAL_WARN itself already prints __FILE__ and __LINE__ of its call site

Change-Id: I214ee188793e7ef189417460ea32eeaf0a8b6a29
WaE: Unreferenced function definition

Change-Id: I25bc6231f4efd76b33db028f6ffea19799519083
WaE: replace '+' between string literals with juxtaposition

Change-Id: I64690ce1d6960dea52bae6a5bc1d0f1de742cb63