views: fix corner case for limitCursor()

If m.width and m.height have not been initialized yet m.x and m.y would
be set to -1. Changing the order fixes that.

views/textarea.go

@@ -57,19 +57,20 @@ func (m *linesModel) GetBounds() (int, int) {
 }
 
 func (m *linesModel) limitCursor() {
-	if m.x < 0 {
-		m.x = 0
-	}
-	if m.y < 0 {
-		m.y = 0
-	}
 	if m.x > m.width-1 {
 		m.x = m.width - 1
 	}
 	if m.y > m.height-1 {
 		m.y = m.height - 1
 	}
+	if m.x < 0 {
+		m.x = 0
+	}
+	if m.y < 0 {
+		m.y = 0
+	}
 }
+
 func (m *linesModel) SetCursor(x, y int) {
 	m.x = x
 	m.y = y