add missing blank line

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@3893 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

src/files.c

@@ -2381,6 +2381,7 @@ char *histfilename(void)
 	strcpy(nanohist, homedir);
 	strcpy(nanohist + homelen, "/.nano_history");
     }
+
     return nanohist;
 }