patch 8.2.4134: MS-Windows: test for import with absolute path fails

Problem:    MS-Windows: test for import with absolute path fails.
Solution:   Handle path starting with slash as an absolute path.
diff --git a/src/version.c b/src/version.c
index 1e9ab2d..8ac5c08 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4134,
+/**/
     4133,
 /**/
     4132,