[edje_entry] Add null checking for name of anchor and item.

Summary:
Even if the anchor name is null, it will be appended to "anchors".
There are many null checking for name of anchor.
So it should be checked in geometry_get functions.

Test Plan:
Test with text "<a href =abc>We can't find name in this case</a>".
This text makes break the application. Because of a space between "href" and "=".
The name of anchor will be saved as null in "anchors".

Reviewers: woohyun, tasn, cedric

CC: cedric, raster

Differential Revision: https://phab.enlightenment.org/D318

ChangeLog

@@ -1,3 +1,7 @@
+2013-11-05  Youngbok Shin
+
+        * Edje: Add null checking for name of anchor and item in geometry get functions.
+
 2013-11-03  Christophe Sadoine
 
         * Eet: Added EET_DATA_DESCRIPTOR_ADD_MAPPING_BASIC().

NEWS

@@ -434,6 +434,7 @@ Fixes:
      - Fix size calculation of flags of signal callbacks
      - Check for both Lua 5.1 and 5.2.
      - Fixed memory leak in the edje map color transition.
+	 - Add null checking for name of anchor and item in geometry get functions.
 
     * Efreet:
      - Fix desktop command parsing of https.

src/lib/edje/edje_entry.c

@@ -2829,8 +2829,10 @@ _edje_entry_anchor_geometry_get(Edje_Real_Part *rp, const char *anchor)
    if (!en) return NULL;
    EINA_LIST_FOREACH(en->anchors, l, an)
      {
+        const char *n = an->name;
         if (an->item) continue;
-        if (!strcmp(anchor, an->name))
+        if (!n) n = "";
+        if (!strcmp(anchor, n))
           return an->sel;
      }
    return NULL;
@@ -2874,8 +2876,10 @@ _edje_entry_item_geometry_get(Edje_Real_Part *rp, const char *item, Evas_Coord *
    if (!en) return EINA_FALSE;
    EINA_LIST_FOREACH(en->anchors, l, an)
      {
+        const char *n = an->name;
         if (an->item) continue;
-        if (!strcmp(item, an->name))
+        if (!n) n = "";
+        if (!strcmp(item, n))
           {
              evas_textblock_cursor_format_item_geometry_get(an->start, cx, cy, cw, ch);
              return EINA_TRUE;