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/spellfile.c b/src/spellfile.c
index 2616afb..00c72f6 100644
--- a/src/spellfile.c
+++ b/src/spellfile.c
@@ -1734,7 +1734,7 @@
 
     for (slang = first_lang; slang != NULL; slang = slang->sl_next)
     {
-	if (fullpathcmp(fname, slang->sl_fname, FALSE) == FPC_SAME)
+	if (fullpathcmp(fname, slang->sl_fname, FALSE, TRUE) == FPC_SAME)
 	{
 	    slang_clear(slang);
 	    if (spell_load_file(fname, NULL, slang, FALSE) == NULL)
@@ -5440,7 +5440,7 @@
      * It might have been done already by spell_reload_one().
      */
     for (slang = first_lang; slang != NULL; slang = slang->sl_next)
-	if (fullpathcmp(wfname, slang->sl_fname, FALSE) == FPC_SAME)
+	if (fullpathcmp(wfname, slang->sl_fname, FALSE, TRUE) == FPC_SAME)
 	    break;
     if (slang == NULL)
     {