patch 9.1.0395: getregionpos() may leak memory on error

Problem:  regionpos may leak memory on error, coverity
          complains about dereferencing Null pointer
Solution: free all list pointers (after v9.1.394),
          return early if buflist_findnr() returns NULL

closes: #14731

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    395,
 /**/
     394,
 /**/