liboconfig: Make sure that option-strings can always be freed.

This resolved a nasty crash when including files.

diff --git a/src/liboconfig/parser.y b/src/liboconfig/parser.y
index 5d7b98d..8df2c6e 100644 (file)
--- a/src/liboconfig/parser.y
+++ b/src/liboconfig/parser.y
@@ -210,8 +210,8 @@ static char *unquote (const char *orig)
        if ((len < 2) || (ret[0] != '"') || (ret[len - 1] != '"'))
                return (ret);
 
-       ret++;
        len -= 2;
+       memmove (ret, ret + 1, len);
        ret[len] = '\0';
 
        for (i = 0; i < len; i++)