From 354327e40b3e2902b17222d83af216ca40977b44 Mon Sep 17 00:00:00 2001
From: Patrick Pelissier <patrick.pelissier@gmail.com>
Date: Fri, 3 Aug 2018 20:23:24 +0200
Subject: [PATCH] Fix issue for string_strim if string was empty and not
 allocated.

---
 m-string.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/m-string.h b/m-string.h
index 290f3940..2dc70778 100644
--- a/m-string.h
+++ b/m-string.h
@@ -782,7 +782,8 @@ string_strim(string_t v, const char charac[])
   while (size > 0 && stringi_strim_char(b[size-1], charac))
     size --;
   if (size == 0) {
-    v->ptr[0] = 0;
+    if (v->ptr != NULL)
+      v->ptr[0] = 0;
     v->size = size;
     return;
   }