Merge branch '2157_ncurses_fill_region'

* 2157_ncurses_fill_region:
  Ticket #2157: fixed tty_fill_region() for ncurses-based TTY layer.

lib/tty/tty-ncurses.c

@@ -295,6 +295,31 @@ tty_fill_region (int y, int x, int rows, int cols, unsigned char ch)
 {
     int i;
 
+    if (y < 0)
+    {
+        rows += y;
+
+        if (rows <= 0)
+            return;
+
+        y = 0;
+    }
+
+    if (x < 0)
+    {
+        cols += x;
+
+        if (cols <= 0)
+            return;
+
+        x = 0;
+    }
+
+    if (y + rows > LINES)
+        rows = LINES - y;
+    if (x + cols > COLS)
+        cols = COLS - x;
+
     for (i = 0; i < rows; i++)
     {
         move (y + i, x);