surround routines by far jump across

examples/proc_skip.csn

@@ -0,0 +1,11 @@
+(
+    (ld r0 1)
+
+    ; the procedure is surrounded by a jump and a label
+    (proc foo
+        (nop)
+        (ret)
+    )
+
+    (ld r0 2)
+)

examples/stacks.csn

@@ -11,5 +11,4 @@
     (cmp r1 1 (ne? (fault)))
 
     (drop @r0)
-    (halt)
 )