patch 8.1.0294: MS-Windows: sometimes uses short directory name

Problem:    MS-Windows: sometimes uses short directory name.
Solution:   Expand to long file name with correct caps. (Nobuhiro Takasaki,
            closes #3334)

src/version.c

@@ -794,6 +794,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    294,
 /**/
     293,
 /**/