Build CEF worker only if CEF is enabled

Signed-off-by: Jiří Janoušek <janousek.jiri@gmail.com>

wscript

@@ -569,18 +569,19 @@ def build(ctx):
 		install_path = ctx.env.NUVOLA_LIBDIR,
 	)
 
-	valalib(
-		target = NUVOLAKIT_CEF_WORKER,
-		source_dir = 'src/nuvolakit-cef-worker',
-		packages = "dioriteglib{0} dioritegtk{0} {1} {2} javascriptcoregtk-4.0".format(TARGET_DIORITE, 'valacef', 'valacefgtk'),
-		uselib = "SOUP DIORITEGLIB DIORITEGTK VALACEF VALACEFGTK JSCORE",
-		use = [NUVOLAKIT_BASE],
-		vala_defines = vala_defines,
-		cflags = ['-DG_LOG_DOMAIN="Nuvola"'],
-		vapi_dirs = vapi_dirs,
-		vala_target_glib = TARGET_GLIB,
-		install_path = ctx.env.NUVOLA_LIBDIR,
-	)
+	if ctx.env.have_cef:
+		valalib(
+			target = NUVOLAKIT_CEF_WORKER,
+			source_dir = 'src/nuvolakit-cef-worker',
+			packages = "dioriteglib{0} dioritegtk{0} {1} {2} javascriptcoregtk-4.0".format(TARGET_DIORITE, 'valacef', 'valacefgtk'),
+			uselib = "SOUP DIORITEGLIB DIORITEGTK VALACEF VALACEFGTK JSCORE",
+			use = [NUVOLAKIT_BASE],
+			vala_defines = vala_defines,
+			cflags = ['-DG_LOG_DOMAIN="Nuvola"'],
+			vapi_dirs = vapi_dirs,
+			vala_target_glib = TARGET_GLIB,
+			install_path = ctx.env.NUVOLA_LIBDIR,
+		)
 
 	valalib(
 		target = NUVOLAKIT_TESTS,