[exceptions:goto] C compiler error with dynlib pragma calling a proc

[Yardanico]

This code triggers an error in the C compiler due to nimErr not being declared in the file at all. Found in https://github.com/paranim/paravim.

Example

proc getLib(): string = "libvim.so"

proc vimWindowSetWidth*(width: cint) {.cdecl, dynlib: getLib(), importc.}
vimWindowSetWidth(cint 768)

Compiled C code output - https://gist.github.com/Yardanico/cf934690ba86bfa8a8949c3f94bd2653

Current Output

In file included from /home/dian/.cache/nim/libvim_r/@mlibvim.nim.c:11:
/home/dian/.cache/nim/libvim_r/@mlibvim.nim.c: In function 'libvimDatInit000':
/home/dian/.cache/nim/libvim_r/@mlibvim.nim.c:123:20: error: 'nimErr_' undeclared (first use in this function); did you mean 'nimfr_'?
  123 |  if (NIM_UNLIKELY(*nimErr_)) goto BeforeRet_;
      |                    ^~~~~~~
/home/dian/.nim/lib/nimbase.h:519:44: note: in definition of macro 'NIM_UNLIKELY'
  519 | #  define NIM_UNLIKELY(x) __builtin_expect(x, 0)
      |                                            ^
/home/dian/.cache/nim/libvim_r/@mlibvim.nim.c:123:20: note: each undeclared identifier is reported only once for each function it appears in
  123 |  if (NIM_UNLIKELY(*nimErr_)) goto BeforeRet_;
      |                    ^~~~~~~
/home/dian/.nim/lib/nimbase.h:519:44: note: in definition of macro 'NIM_UNLIKELY'
  519 | #  define NIM_UNLIKELY(x) __builtin_expect(x, 0)
      |                                            ^
/home/dian/.cache/nim/libvim_r/@mlibvim.nim.c:123:2: error: label 'BeforeRet_' used but not defined
  123 |  if (NIM_UNLIKELY(*nimErr_)) goto BeforeRet_;
      |  ^~
Error: execution of an external compiler program 'gcc -c  -w -O3 -fno-strict-aliasing -fno-ident  -I/home/dian/.nim/lib -I/home/dian/Projects/data/paravim/src/paravim -o /home/dian/.cache/nim/libvim_r/@mlibvim.nim.c.o /home/dian/.cache/nim/libvim_r/@mlibvim.nim.c' failed with exit code: 1

$ nim -v
Nim Compiler Version 1.3.1 [Linux: amd64]
Compiled at 2020-05-05
Copyright (c) 2006-2020 by Andreas Rumpf

git hash: e86a6d24d5ffe43e9dc7f230b80c274167376225
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