style numérotation en repartant de zéro

latex/yslistings.sty

@@ -37,6 +37,7 @@
   {∅}{{∅}}1{ε}{{ε}}1
 }
 \lstdefinestyle{numbers}{numbers = left, xleftmargin=2em}
+\lstdefinestyle{numbers-zero}{numbers = left, xleftmargin=2em, firstnumber=0}
 \lstdefinestyle{nonumbers}{numbers = none}
 \let\nm\|