From 9058ccb3ebe0d6042d40dc9806bb9a7d5464c8d7 Mon Sep 17 00:00:00 2001
From: "kr.angelov" <kr.angelov@gmail.com>
Date: Sat, 22 Jun 2013 15:39:47 +0000
Subject: [PATCH] bugfix for the word completion in the C runtime

---
 src/runtime/c/gu/string.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/runtime/c/gu/string.c b/src/runtime/c/gu/string.c
index 7dc90e1e3..7ffd43068 100644
--- a/src/runtime/c/gu/string.c
+++ b/src/runtime/c/gu/string.c
@@ -352,12 +352,16 @@ gu_string_is_prefix(GuString s1, GuString s2)
 		str2 = (char*) &p[1];
 	}
 
-	while (sz1 > 0 && sz2 > 0) {
+	
+	if (sz1 > sz2)
+		return false;
+
+	for (size_t sz = sz1; sz--; sz > 0) {
 		if (*str1 != *str2)
 			return false;
 			
-		str1++; sz1--;
-		str2++; sz2--;
+		str1++;
+		str2++;
 	}
 
 	return true;