patch 8.1.1791: 'completeslash' also applies to globpath()

Problem:    'completeslash' also applies to globpath().
Solution:   Add the WILD_IGNORE_COMPLETESLASH flag. (test by Yasuhiro
            Matsumoto, closes #4760)
diff --git a/src/vim.h b/src/vim.h
index 99ffc10..6f7a11d 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -785,16 +785,17 @@
 #define WILD_LONGEST		7
 #define WILD_ALL_KEEP		8
 
-#define WILD_LIST_NOTFOUND	0x01
-#define WILD_HOME_REPLACE	0x02
-#define WILD_USE_NL		0x04
-#define WILD_NO_BEEP		0x08
-#define WILD_ADD_SLASH		0x10
-#define WILD_KEEP_ALL		0x20
-#define WILD_SILENT		0x40
-#define WILD_ESCAPE		0x80
-#define WILD_ICASE		0x100
-#define WILD_ALLLINKS		0x200
+#define WILD_LIST_NOTFOUND	    0x01
+#define WILD_HOME_REPLACE	    0x02
+#define WILD_USE_NL		    0x04
+#define WILD_NO_BEEP		    0x08
+#define WILD_ADD_SLASH		    0x10
+#define WILD_KEEP_ALL		    0x20
+#define WILD_SILENT		    0x40
+#define WILD_ESCAPE		    0x80
+#define WILD_ICASE		    0x100
+#define WILD_ALLLINKS		    0x200
+#define WILD_IGNORE_COMPLETESLASH   0x400
 
 // Flags for expand_wildcards()
 #define EW_DIR		0x01	// include directory names