MsgOrigin doesn't honor listfullpaths:off

[timotheecour]

links

D20201216T123530

eg:

nim c -r -d:case1 --listfullpaths:off $timn_D/tests/nim/all/t11521.nim
t11521.nim(5, 1) template/generic instantiation from here
t11521.nim(10, 14) Error: expression 'fn[float32]()' cannot be called
    fn[float32]()
               ^
/Users/timothee/git_clone/nim/Nim_devel/compiler/semcall.nim(414, 19) compiler msg initiated here [MsgOrigin]

[timotheecour]

that's because of:
compiler/msgs.nim:

template instLoc*(): InstantiationInfo = instantiationInfo(-2, fullPaths = true)

fullPaths = true should depend on --filenames:abs

refs nim-lang#17746