fix: Skip negative screen coordinates only after we read the bitmap row. (#431)

Otherwise, we don't crop properly.

Fixes #430 

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lib/GfxRenderer/GfxRenderer.cpp

@@ -201,9 +201,6 @@ void GfxRenderer::drawBitmap(const Bitmap& bitmap, const int x, const int y, con
     if (screenY >= getScreenHeight()) {
       break;
     }
-    if (screenY < 0) {
-      continue;
-    }
 
     if (bitmap.readNextRow(outputRow, rowBytes) != BmpReaderError::Ok) {
       Serial.printf("[%lu] [GFX] Failed to read row %d from bitmap\n", millis(), bmpY);
@@ -212,6 +209,10 @@ void GfxRenderer::drawBitmap(const Bitmap& bitmap, const int x, const int y, con
       return;
     }
 
+    if (screenY < 0) {
+      continue;
+    }
+
     if (bmpY < cropPixY) {
       // Skip the row if it's outside the crop area
       continue;