edje_util: Prevent null pointer access

Summary: locale can be null. so add null check.

Test Plan: N/A

Reviewers: Hermet, kimcinoo, herb

Reviewed By: Hermet

Subscribers: cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D11490

src/lib/edje/edje_util.c

@@ -326,6 +326,7 @@ edje_language_set(const char *locale)
    char *loc;
    int length;
 
+   if (!locale) return;
    lookup = strstr(locale, ".");
    length = lookup ? lookup - locale : (int)strlen(locale);
    loc = alloca(length + 1);