evas - software generic - fix crash when buffer is freed when its the same

evas_render_engine_software_generic_update(0 definitely is wrong where
it wants to always free the outbuf even if the buffer passed in is the
same one and thus it ends up being freed and now invalid. fix it

@fix

1 files changed, 5 insertions, 2 deletions

diff --git a/src/modules/evas/engines/software_generic/Evas_Engine_Software_Generic.h b/src/modules/evas/engines/software_generic/Evas_Engine_Software_Generic.h
index b716b6b418..59537c99d9 100644
--- a/src/modules/evas/engines/software_generic/Evas_Engine_Software_Generic.h
+++ b/src/modules/evas/engines/software_generic/Evas_Engine_Software_Generic.h
@@ -177,8 +177,11 @@ evas_render_engine_software_generic_update(Render_Engine_Software_Generic *re,
                                            Outbuf *ob,
                                            int w, int h)
 {
-   if (re->ob) re->outbuf_free(re->ob);
-   re->ob = ob;
+   if ((re->ob) && (re->ob != ob))
+     {
+        re->outbuf_free(re->ob);
+        re->ob = ob;
+     }
 
    evas_common_tilebuf_free(re->tb);
    re->tb = evas_common_tilebuf_new(w, h);