patch 8.2.0850: MS-Windows: exepath() works different from cmd.exe

Problem:    MS-Windows: exepath() works different from cmd.exe.
Solution:   Make exepath() work better on MS-Windows. (closes #6115)
diff --git a/src/version.c b/src/version.c
index 59c314b..6fb570d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    850,
+/**/
     849,
 /**/
     848,