[geany/geany] cac111: Prevent reading past start of Scintilla buffer

[elextr]

Branch:      refs/heads/master
Author:      elextr <elextr at gmail.com>
Committer:   elextr <elextr at gmail.com>
Date:        Thu, 18 Jul 2013 02:36:42 UTC
Commit:      cac1115ced305f4828cbc49f08c12d95e05d9e85
             https://github.com/geany/geany/commit/cac1115ced305f4828cbc49f08c12d95e05d9e85

Log Message:
-----------
Prevent reading past start of Scintilla buffer

A quick check seemed to show Scintilla does not check the minimum
value is positive, so just check here to be safe and log message
if it fails.


Modified Paths:
--------------
    src/editor.c

Modified: src/editor.c
1 files changed, 1 insertions(+), 0 deletions(-)
===================================================================
@@ -665,6 +665,7 @@ static gboolean match_last_chars(ScintillaObject *sci, gint pos, const gchar *st
 	gchar *buf;
 
 	g_return_val_if_fail(len < 100, FALSE);
+	g_return_val_if_fail(len <= pos, FALSE);
 
 	buf = g_alloca(len + 1);
 	sci_get_text_range(sci, pos - len, pos, buf);



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