Fix some minor canvas errors

mibpov.js

@@ -932,6 +932,7 @@ function checkDrawValid(context) {
 		putResizeCorner(context);
 		return false;
 	}
+	drawError = false;
 	return true;
 }
 
@@ -947,10 +948,10 @@ function drawModern(recalculate) {
 	// shorter function name (for "convert")
 	let conv = biomeCoordsToCanvasPixelCoords
 
+	clear(context);
 	if (!checkDrawValid(context)) {
 		return false;
 	}
-	clear(context);
 
 	let points = getRenderedPoints(y);
 	// Fail and render a special message if there are no biomes
@@ -1142,14 +1143,11 @@ function drawV6() {
 	let h = voronoiCanvas.height;
 	let y = getViewY();
 
-
+	clear(context);
 	if (!checkDrawValid(context)) {
 		return false;
 	}
 
-	clear(context);
-
-
 	if (v6_flag_snowbiomes) {
 
 		let cx, cy;
@@ -1253,6 +1251,8 @@ function drawV6() {
 	if (showAxes) {
 		putAxes(context);
 	}
+
+	putResizeCorner(context);
 }
 
 function draw(recalculate) {