move spark_particle's mknew call to the right spot

updatedshmup.p8

@@ -1790,6 +1790,7 @@ function boom(x,y,boominess,is_boss)
 end
 
 spark_particle={}
+mknew(spark_particle)
 
 function spark_particle:move()
  if (rnd(4) < 1) self.sidx += 1
@@ -1802,7 +1803,6 @@ end
 function spark_particle:draw()
  pset(self.x,self.y,self.sprs[self.sidx])
 end
-mknew(spark_particle)
 
 function spark(sprs, x, y, butts, thrust, odds, fg)
  if (sprs==nil or flr(rnd(odds)) ~= 0) return