3610404 When we let go of commandPtr in TclEvalObjvInternal, NULL out the
variable so we don't mistakenly try to use the value later after we freed it.
merge-mark
Implement many Tcl_*Var* functions and Tcl_GetIndexFromObj as (faster/stack-saving) macros around resp their Tcl_*Var*2 equivalent and Tcl_GetIndexFromObjStruct
Implement many Tcl_*Var* functions and Tcl_GetIndexFromObj as (faster/stack-saving) macros around resp their Tcl_*Var*2 equivalent and Tcl_GetIndexFromObjStruct
Implement many Tcl_*Var* functions and Tcl_GetIndexFromObj as (faster/stack-saving) macros around resp their Tcl_*Var*2 equivalent and Tcl_GetIndexFromObjStruct
merge-mark