add child_count to scope

src/symtab.c

@@ -73,7 +73,7 @@ void push_scope(Scope scope) {
         }
         scope->parent = before;
         scope->depth = before->depth + 1;
-
+        before->child_count++;
         scope_stack_top++;
         scope_stack[scope_stack_top] = scope;
     }

src/symtab.h

@@ -57,6 +57,8 @@ struct Scope {
     struct Scope *child_last;
     struct Scope *next_sibling;
 
+    int child_count;
+
     int location;
     BucketList hashTable[SYMTAB_SIZE];
 };