Tweak listing options for Schmidt snippet

tex/bounds-on-semistabilisers.tex

@@ -12,7 +12,9 @@ pseudo-semistabilisers for tilt stability.
 
 \lstinputlisting[
 	caption={\raggedleft snippet from \cite{SchmidtGithub2020} \texttt{stability_conditions.tilt.walls_left}},
-	label={fig:code:schmidt-bound}
+	label={fig:code:schmidt-bound},
+	linerange=1-7,
+	firstnumber=1015
 ]{schmidt-snippet}
 
 \begin{theorem}[Bound on $r$ - Benjamin Schmidt]