patch 9.0.0803: readblob() cannot read from character device

Problem:    readblob() cannot read from character device.
Solution:   Use S_ISCHR() to not check the size. (Ken Takata, closes #11407)
diff --git a/src/version.c b/src/version.c
index 34ff382..0de044e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    803,
+/**/
     802,
 /**/
     801,