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/gui.c b/src/gui.c
index da7284f..8568c20 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -603,22 +603,22 @@
 #endif
 
 		if (       fullpathcmp((char_u *)USR_GVIMRC_FILE,
-				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
+				(char_u *)GVIMRC_FILE, FALSE, TRUE) != FPC_SAME
 #ifdef SYS_GVIMRC_FILE
 			&& fullpathcmp((char_u *)SYS_GVIMRC_FILE,
-				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
+				(char_u *)GVIMRC_FILE, FALSE, TRUE) != FPC_SAME
 #endif
 #ifdef USR_GVIMRC_FILE2
 			&& fullpathcmp((char_u *)USR_GVIMRC_FILE2,
-				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
+				(char_u *)GVIMRC_FILE, FALSE, TRUE) != FPC_SAME
 #endif
 #ifdef USR_GVIMRC_FILE3
 			&& fullpathcmp((char_u *)USR_GVIMRC_FILE3,
-				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
+				(char_u *)GVIMRC_FILE, FALSE, TRUE) != FPC_SAME
 #endif
 #ifdef USR_GVIMRC_FILE4
 			&& fullpathcmp((char_u *)USR_GVIMRC_FILE4,
-				     (char_u *)GVIMRC_FILE, FALSE) != FPC_SAME
+				(char_u *)GVIMRC_FILE, FALSE, TRUE) != FPC_SAME
 #endif
 			)
 		    do_source((char_u *)GVIMRC_FILE, TRUE, DOSO_GVIMRC);