patch 9.1.0702: Patch 9.1.0700 broke CI

Problem:  Patch 9.1.0700 broke CI
Solution: Revert for now

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/fileio.c b/src/fileio.c
index 890eac7..d27a172 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -5714,8 +5714,7 @@
 				)
 			    *allow_dirs = TRUE;
 			reg_pat[i++] = '\\';
-			if (enc_dbcs != 0 && (*mb_ptr2len)(p) > 1)
-			    reg_pat[i++] = *p++;
+			reg_pat[i++] = *p;
 		    }
 		break;
 #ifdef BACKSLASH_IN_FILENAME