Do not try to project images that don't have set 'need_to_project'. (#…

…8255)

Fixes #8254

src/grdimage.c

@@ -1970,7 +1970,7 @@ tr_image: GMT_Report (API, GMT_MSG_INFORMATION, "Project the input image\n");
  gmt_set_grddim (GMT, Img_proj->header); /* Recalculate projected image dimensions */
  if (GMT_Create_Data (API, GMT_IS_IMAGE, GMT_IS_SURFACE, GMT_DATA_ONLY, NULL, NULL, NULL, 0, 0, Img_proj) == NULL)
  Return (API->error); /* Failed to allocate memory for the projected image */
- if (gmt_img_project (GMT, I, Img_proj, false)) Return (GMT_RUNTIME_ERROR); /* Now project the image onto the projected rectangle */
+ if (need_to_project && gmt_img_project (GMT, I, Img_proj, false)) Return (GMT_RUNTIME_ERROR); /* Now project the image onto the projected rectangle */
  if (!API->external && (GMT_Destroy_Data (API, &I) != GMT_NOERROR)) { /* Free the original image now we have projected. Use Img_proj from now on */
  Return (API->error); /* Failed to free the image */
  }