patch 8.0.1576: Perl VIM::Buffers() does not find every buffer

Problem:    Perl VIM::Buffers() does not find every buffer.
Solution:   Also find unlisted buffer by number or name. (Chris Weyl,
            closes #2692)

src/if_perl.xs

@@ -1558,7 +1558,7 @@ Buffers(...)
 
 		pat = (char_u *)SvPV(sv, len);
 		++emsg_off;
-		b = buflist_findpat(pat, pat+len, FALSE, FALSE, FALSE);
+		b = buflist_findpat(pat, pat + len, TRUE, FALSE, FALSE);
 		--emsg_off;
 	    }
 

src/version.c

@@ -766,6 +766,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1576,
 /**/
     1575,
 /**/