patch 7.4.1595

Problem:    Not checking for failed open(). (Coverity)
Solution:   Check file descriptor not being negative.

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1595,
 /**/
     1594,
 /**/