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/if_cscope.c b/src/if_cscope.c
index 0334674..93a0458 100644
--- a/src/if_cscope.c
+++ b/src/if_cscope.c
@@ -1401,10 +1401,10 @@
 #if defined(UNIX)
 	    && csinfo[j].st_dev == sb->st_dev && csinfo[j].st_ino == sb->st_ino
 #else
-	    /* compare pathnames first */
+	    // compare pathnames first
 	    && ((fullpathcmp((char_u *)csinfo[j].fname,
-			(char_u *)fname, FALSE) & FPC_SAME)
-		/* test index file attributes too */
+			(char_u *)fname, FALSE, TRUE) & FPC_SAME)
+		// test index file attributes too
 		|| (csinfo[j].nVolume == bhfi.dwVolumeSerialNumber
 		    && csinfo[j].nIndexHigh == bhfi.nFileIndexHigh
 		    && csinfo[j].nIndexLow == bhfi.nFileIndexLow))