[gnome-builder] editorconfig: fix warning when building without stack protection

[Christian Hergert <chergert src gnome org>]

commit 5ad9b41925ae41d11c4ae3919a6ff8f925abe126
Author: Christian Hergert <chergert redhat com>
Date:   Wed Apr 11 14:30:07 2018 -0700

    editorconfig: fix warning when building without stack protection

 src/libeditorconfig/ini.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/libeditorconfig/ini.c b/src/libeditorconfig/ini.c
index 5ea68380f..c01da5d64 100644
--- a/src/libeditorconfig/ini.c
+++ b/src/libeditorconfig/ini.c
@@ -90,7 +90,7 @@ static char* find_last_char_or_comment(const char* s, char c)
 /* Version of strncpy that ensures dest (size bytes) is null-terminated. */
 static char* strncpy0(char* dest, const char* src, size_t size)
 {
-    strncpy(dest, src, size);
+    strncpy(dest, src, size - 1);
     dest[size - 1] = '\0';
     return dest;
 }