Merge branch 'devel/fix-warnings' into 'master'

...iler/src/exastencils/app/ir/IR_WaLBerlaLayerHandler.scala

Compiler/src/exastencils/config/Knowledge.scala

.../src/exastencils/field/ir/IR_GenerateIndexManipFcts.scala

Compiler/src/exastencils/timing/ir/IR_PrintAllTimers.scala

...xastencils/waLBerla/ir/field/IR_WaLBerlaFieldAccess.scala

...cils/waLBerla/ir/field/IR_WaLBerlaInitFieldDataPtrs.scala

...erla/ir/interfacing/IR_WaLBerlaInitWrapperFunctions.scala