* src/clj/cljs/compiler.clj: fix bug around fns whose only non-zero a…

…rity is variadic (i.e. hash-set). was emitting a false - false does not get emitted as empty string like nil does.

src/clj/cljs/compiler.clj

@@ -459,7 +459,7 @@
               (do (emitln "default:")
                   (emitln "return " n ".cljs$lang$arity$variadic("
                           (comma-sep (butlast maxparams))
-                          (and (> (count maxparams) 1) ", ")
+                          (when (> (count maxparams) 1) ", ")
                           "cljs.core.array_seq(arguments, " max-fixed-arity "));"))
               (let [pcnt (count (:params meth))]
                 (emitln "case " pcnt ":")