Fix error in indexing for matrix-to-grid input

Author: seisman

src/gmt_api.c

@@ -5522,6 +5522,10 @@ GMT_LOCAL struct GMT_GRID *gmtapi_import_grid (struct GMTAPI_CTRL *API, int obje
 					else if (S_obj->wesn[XHI] < G_obj->header->wesn[XLO]) { /* Must first wrap G_obj->header->wesn east to fit the data */
 						G_obj->header->wesn[XLO] -= 360.0;	G_obj->header->wesn[XHI] -= 360.0;
 					}
+
+					if (S_obj->wesn[XLO] < G_obj->header->wesn[XLO]) { /* Must wrap G_obj->header.wesn so that  west to fit the data */
+						G_obj->header->wesn[XLO] -= 360.0;	G_obj->header->wesn[XHI] -= 360.0;
+					}
 				}
 				j1 = (unsigned int)gmt_M_grd_y_to_row (GMT, S_obj->wesn[YLO]+dy, G_obj->header);
 				j0 = (unsigned int)gmt_M_grd_y_to_row (GMT, S_obj->wesn[YHI]-dy, G_obj->header);