Make function-declaration example compile and work

example.vli

@@ -1,9 +1,12 @@
 ;; Check that lambdas can be passed as arguments
 
-((lambda (f y) (f y))
- (lambda (x) (* x x))
+((fn (f y) (f y))
+ (fn (x) (* x x))
  2)
 
-(((lambda (x)
-    (lambda () (* x x 2)))
+(((fn (x)
+    (fn () (* x x 2)))
   2))
+
+
+(fn foo (x y) (* x y))

src/common.hpp

@@ -554,7 +554,7 @@ class Symbol : public Object {
     uint64_t i = 0;
     uint64_t j = 0;
     while (1) {
-      if (i == lsize && j == lsize) return 0;
+      if (i == lsize && j == rsize) return 0;
 
       short cmp = short(i == lsize) - short(j == rsize);
       if (cmp != 0) return cmp;