[12gevmoller_sim] [EXTERNAL] [JeffersonLab/remoll] 334667: Fix typo in variable name

[rahmans1]

  Branch: refs/heads/feature-add-zoffset-option-gen-external
  Home:   https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_JeffersonLab_remoll&d=DwICaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=-0uahHXTLsQsllHBZNHgOynLaY6DUxqehsUJ91-BlNY&m=YK-tcveskt5JOWZizoC3ct04U-ll2T7au-somUT3SPE&s=C-TAfBkqotLwMASppdbR0KqQJTvGUUYmOYxD02RLFiA&e= 
  Commit: 334667f990d8f8bb3ac1787485a24d5ec1f67e37
      https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_JeffersonLab_remoll_commit_334667f990d8f8bb3ac1787485a24d5ec1f67e37&d=DwICaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=-0uahHXTLsQsllHBZNHgOynLaY6DUxqehsUJ91-BlNY&m=YK-tcveskt5JOWZizoC3ct04U-ll2T7au-somUT3SPE&s=Jxpo48qEz6dAi1MHp4GbWhembTbamlaCO2c0Na5NBi4&e= 
  Author: Sakib Rahman <rahmans at myumanitoba.ca>
  Date:   2021-04-30 (Fri, 30 Apr 2021)

  Changed paths:
    M src/remollGenExternal.cc

  Log Message:
  -----------
  Fix typo in variable name