render: free already allocated formats in PictureInit failure case

Probably pointless, if this fails you're not likely to get far...

Reviewed-by: Rémi Cardona <remi@gentoo.org>
Signed-off-by: Julien Cristau <jcristau@debian.org>
(cherry picked from commit 4217db89ec)

render/picture.c

@@ -665,6 +665,9 @@ PictureInit(ScreenPtr pScreen, PictFormatPtr formats, int nformats)
     for (n = 0; n < nformats; n++) {
         if (!AddResource
             (formats[n].id, PictFormatType, (void *) (formats + n))) {
+            int i;
+            for (i = 0; i < n; i++)
+                FreeResource(formats[i].id, RT_NONE);
             free(formats);
             return FALSE;
         }