libxl: libxl_ctx_free should free the ctx

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>

tools/libxl/libxl.c

@@ -93,6 +93,7 @@ int libxl_ctx_free(libxl_ctx *ctx)
     if (ctx->xch) xc_interface_close(ctx->xch);
     libxl_version_info_dispose(&ctx->version_info);
     if (ctx->xsh) xs_daemon_close(ctx->xsh);
+    free(ctx);
     return 0;
 }