Avoid crash on huge screens.

Fix by @Explorer09 (see discussion on #355).

Meter.c

@@ -407,7 +407,12 @@ static void GraphMeterMode_draw(Meter* this, int x, int y, int w) {
       data->values[nValues - 1] = value;
    }
    
-   for (int i = nValues - (w*2) + 2, k = 0; i < nValues; i+=2, k++) {
+   int i = nValues - (w*2) + 2, k = 0;
+   if (i < 0) {
+      k = -i/2;
+      i = 0;
+   }
+   for (; i < nValues; i+=2, k++) {
       int pix = GraphMeterMode_pixPerRow * GRAPH_HEIGHT;
       int v1 = CLAMP(data->values[i] * pix, 1, pix);
       int v2 = CLAMP(data->values[i+1] * pix, 1, pix);