Fix fatal typo ignoring potential change in the content of maps
Fix fatal typo ignoring potential change in the content of maps

(cherry picked from commit 55576ee33351d4c98d92b05a62a0920596955d50)

This also happens coincidentally (!) to fix ROOT-6064.

tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,kirbyherm/root-r-tools,Dr15Jones/root,kirbyherm/root-r-tools,Dr15Jones/root,tc3t/qoot,Dr15Jones/root,kirbyherm/root-r-tools,Dr15Jones/root,kirbyherm/root-r-tools,Dr15Jones/root,Dr15Jones/root,tc3t/qoot,tc3t/qoot,kirbyherm/root-r-tools,kirbyherm/root-r-tools,Dr15Jones/root,tc3t/qoot,tc3t/qoot,kirbyherm/root-r-tools