Fix crash when unable to resize image

src/helpers/image.js

@@ -39,7 +39,7 @@ export function getImageLightness(image) {
 
 /**
  * @typedef ResizedImage
- * @property {Blob} blob
+ * @property {Blob|null} blob The blob of the resized image, `null` if the image was unable to be resized to that dimension
  * @property {number} width
  * @property {number} height
  */

src/modals/SelectMapModal.js

@@ -190,6 +190,7 @@ function SelectMapModal({
               file.type,
               resolution.quality
             );
+            if (resized.blob) {
               const resizedBuffer = await blobToBuffer(resized.blob);
               resolutions[resolution.id] = {
                 file: resizedBuffer,
@@ -200,6 +201,7 @@ function SelectMapModal({
               };
             }
           }
+        }
         // Create thumbnail
         const thumbnail = await createThumbnail(image, file.type);