Fix bugs when moving signs

Signs could not be repositioned on top of another sign (dependent on
the indices of the two signs), and could not be placed after selecting
an element from the menu.

1 files changed, 7 insertions, 5 deletions

diff --git a/src/interface.c b/src/interface.c
index 3ef7ed2..7f7ec65 100644
--- a/src/interface.c
+++ b/src/interface.c
@@ -150,15 +150,17 @@ void add_sign_ui(pixel *vid_buf, int mx, int my)
 	int x0=(XRES-192)/2,y0=(YRES-80)/2,b=1,bq;
 	ui_edit ed;
 
+	// if currently moving a sign, stop doing so
+	if (MSIGN!=-1)
+	{
+		MSIGN = -1;
+		return;
+	}
+
 	// check if it is an existing sign
 	for (i=0; i<MAXSIGNS; i++)
 		if (signs[i].text[0])
 		{
-			if (i == MSIGN)
-			{
-				MSIGN = -1;
-				return;
-			}
 			get_sign_pos(i, &x, &y, &w, &h);
 			if (mx>=x && mx<=x+w && my>=y && my<=y+h)
 				break;