fix(checker): record instantiated poly proc on selector when used as a proc value

src/check_expr.cpp

@@ -951,7 +951,12 @@ gb_internal i64 check_distance_between_types(CheckerContext *c, Operand *operand
 		if (check_polymorphic_procedure_assignment(c, operand, type, operand->expr, &poly_proc_data)) {
 			Entity *e = poly_proc_data.gen_entity;
 			add_type_and_value(c, operand->expr, Addressing_Value, e->type, {});
-			add_entity_use(c, operand->expr, e);
+			Ast *expr = unparen_expr(operand->expr);
+			if (expr->kind == Ast_SelectorExpr) {
+				add_entity_use(c, expr->SelectorExpr.selector, e);
+			} else {
+				add_entity_use(c, operand->expr, e);
+			}
 			return 4;
 		}