Fix rv assignment in mutt_window_mvprintw(). (closes #3964)

Mutt doesn't check the return value, so this wasn't causing a bug, but
was incorrect.

Thanks to dcb314 for reporting the issue.

1 files changed, 1 insertions, 1 deletions

diff --git a/curs_lib.c b/curs_lib.c
index 1a2bb9e9..ecac6d95 100644
--- a/curs_lib.c
+++ b/curs_lib.c
@@ -665,7 +665,7 @@ int mutt_window_mvprintw (mutt_window_t *win, int row, int col, const char *fmt,
   va_list ap;
   int rv;
 
-  if ((rv = mutt_window_move (win, row, col) != ERR))
+  if ((rv = mutt_window_move (win, row, col)) != ERR)
   {
     va_start (ap, fmt);
     rv = vw_printw (stdscr, fmt, ap);