Simplify generator

example/main.nub

@@ -6,12 +6,10 @@ struct Human {
 }
 
 export func main(args: []^string) {
-    let human = [1]Human
-
-    human[0] = alloc Human {
+    let me = alloc Human {
         name = "oliver"
-        age = 123
+        age = 32
     }
 
-    c::printf("%s\n", human[1].name)
+    c::printf("%s is %d years old\n", me.name, me.age)
 }