From 4b6f350369d1a27353f521c25fd938b6232b631a Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Mon, 29 Apr 2019 13:48:15 -0400
Subject: [PATCH] DirectAllocator: move if > 0 condition above @memcpy

Minor improvement to 3c13aa17 as noted by daurnimator
---
 std/heap.zig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/std/heap.zig b/std/heap.zig
index bb2cd4f4d8..65d346262b 100644
--- a/std/heap.zig
+++ b/std/heap.zig
@@ -141,8 +141,8 @@ pub const DirectAllocator = struct {
                     return shrink(allocator, old_mem, old_align, new_size, new_align);
                 }
                 const result = try alloc(allocator, new_size, new_align);
-                @memcpy(result.ptr, old_mem.ptr, std.math.min(old_mem.len, result.len));
-                if (old_mem.len > 0) {
+                if (old_mem.len != 0) {
+                    @memcpy(result.ptr, old_mem.ptr, std.math.min(old_mem.len, result.len));
                   _ = os.posix.munmap(@ptrToInt(old_mem.ptr), old_mem.len);
                 }
                 return result;