patch 8.1.1371: cannot recover from a swap file

Problem:    Cannot recover from a swap file.
Solution:   Do not expand environment variables in the swap file name.
            Do not check the extension when we already know a file is a swap
            file.  (Ken Takata, closes 4415, closes #4369)
diff --git a/src/search.c b/src/search.c
index 56bd763..033f163 100644
--- a/src/search.c
+++ b/src/search.c
@@ -5170,7 +5170,8 @@
 			i = old_files;
 		    if (i == max_path_depth)
 			break;
-		    if (fullpathcmp(new_fname, files[i].name, TRUE) & FPC_SAME)
+		    if (fullpathcmp(new_fname, files[i].name, TRUE, TRUE)
+								    & FPC_SAME)
 		    {
 			if (type != CHECK_PATH &&
 				action == ACTION_SHOW_ALL && files[i].matched)