fix sp initial gls

rules.tex

@@ -468,8 +468,8 @@ Finally, a member of the nobility, even a minor noble, should have some basic Ac
 
 An open ended list of equipment is provided to give a basic idea of costs.
 The basic coinage covered here is human coinage, but each culture will use their own currency and exchange rates.
-A hundred \glsentryfullpl{cp} is worth 1 \glsentryfull{sp}.
-10 \glspl{sp} is worth 1 \glsentryfull{gp}.
+A hundred \glsentryfullpl{cp} is worth 1 \gls{sp}.
+10 \glspl{sp} is worth 1 \gls{gp}.
 
 An average villager will make little spare money -- perhaps 10 \glspl{sp} in a year if they bother to save.
 Sellswords can expect to make upwards to 10 gold per year if they are hired by a villagemaster.