[Fix] nvm install -b: do not attempt to download source on a failed…

… binary download with `-b`

Fixes 3399

nvm.sh

@@ -2437,7 +2437,7 @@ nvm_download_artifact() {
  nvm_err "Downloading ${TARBALL_URL}..."
  nvm_download -L -C - "${PROGRESS_BAR}" "${TARBALL_URL}" -o "${TARBALL}" || (
  command rm -rf "${TARBALL}" "${tmpdir}"
- nvm_err "Binary download from ${TARBALL_URL} failed, trying source."
+ nvm_err "download from ${TARBALL_URL} failed"
  return 4
  )
 
@@ -3560,7 +3560,7 @@ nvm() {
  EXIT_CODE=-1
  fi
 
- if [ $EXIT_CODE -ne 0 ]; then
+ if [ $EXIT_CODE -ne 0 ] && [ $nosource -ne 1 ]; then
  if [ -z "${NVM_MAKE_JOBS-}" ]; then
  nvm_get_make_jobs
  fi