patch 8.0.1323: mouse events in a terminal window may cause endless loop

Problem:    Mouse events in a terminal window may cause endless loop.
Solution:   Adjust position computation.  Don't stuff a mouse event when
            coming from normal_cmd().
diff --git a/src/terminal.c b/src/terminal.c
index f1b4313..a4caa42 100644
--- a/src/terminal.c
+++ b/src/terminal.c
@@ -1302,9 +1302,9 @@
 	case K_MOUSELEFT:
 	case K_MOUSERIGHT:
 	    if (mouse_row < W_WINROW(curwin)
-		    || mouse_row >= (W_WINROW(curwin) + curwin->w_height)
+		    || mouse_row > (W_WINROW(curwin) + curwin->w_height)
 		    || mouse_col < curwin->w_wincol
-		    || mouse_col >= W_ENDCOL(curwin)
+		    || mouse_col > W_ENDCOL(curwin)
 		    || dragging_outside)
 	    {
 		/* click or scroll outside the current window */