OpenCPN: use cmake-wxWidgets-gtk3 build_helper

srcpkgs/OpenCPN/template

@@ -3,6 +3,7 @@ pkgname=OpenCPN
 version=5.2.0
 revision=1
 build_style=cmake
+build_helper=cmake-wxWidgets-gtk3
 configure_args="-DOCPN_BUNDLE_GSHHS=NONE -DOCPN_BUNDLE_TCDATA=ON
  -DOCPN_BUNDLE_DOCS=ON -DOCPN_FORCE_GTK3=ON
  -DOCPN_USE_CRASHREPORT=$(vopt_if crashreport ON OFF)
@@ -32,10 +33,6 @@ case $XBPS_TARGET_MACHINE in
 	*) build_options_default+=" crashreport";;
 esac
 
-if [ -z "$CROSS_BUILD" ]; then
-	configure_args+=" -DwxWidgets_CONFIG_EXECUTABLE=/usr/bin/wx-config-gtk3"
-fi
-
 CFLAGS="-fcommon"
 
 post_install() {