FPE fix for ShowerDepthTool
ShowerDepthTool: Check for identical R in layer 1 and layer 2 (FPE fix).
Also use std::optional instead of -9999 to denote an invalid return value.
See also the discussion on ATLASRECTS-5923
ShowerDepthTool: Check for identical R in layer 1 and layer 2 (FPE fix).
Also use std::optional instead of -9999 to denote an invalid return value.
See also the discussion on ATLASRECTS-5923