Revert "Fix overtone#163 Another case where only the first channel of…

… a multi-channel Inst is audible."

This change caused an excessive number of id's to be allocated when
compiling some of the insts that are packaged with overtone.

This reverts commit 98cb062.

reopen overtone#163

src/overtone/studio/inst.clj

@@ -88,7 +88,9 @@
                  *constants* #{}]
          (with-overloaded-ugens
            (let [form# ~@ugen-form
-		 n-chans# (if (coll? form#) (count form#) 1)
+                 n-chans# (if (seq? form#)
+                            (count form#)
+                            1)
                  inst-bus# (or (:bus (get (:instruments @studio*) ~sname)) (audio-bus n-chans#))
                  [ugens# constants#] (gather-ugens-and-constants (out inst-bus# form#))
                  ugens# (topological-sort-ugens ugens#)