Guard browser OPFS default machine path helper

wasm-port/tests/browser/interp_smoke.html

@@ -4480,9 +4480,9 @@
 
     function assertMachineTextStorePaths(label, paths, machineId) {
       const expectedPaths = {
-        ini: `linuxcnc/machines/${machineId}/machine.ini`,
-        toolTable: `linuxcnc/machines/${machineId}/tool.tbl`,
-        parameters: `linuxcnc/machines/${machineId}/linuxcnc.var`,
+        ini: opfsMachineFilePath(machineId, "machine.ini"),
+        toolTable: opfsMachineFilePath(machineId, "tool.tbl"),
+        parameters: opfsMachineFilePath(machineId, "linuxcnc.var"),
       };
       for (const [name, expectedPath] of Object.entries(expectedPaths)) {
         if (paths[name] !== expectedPath) {
@@ -4591,9 +4591,9 @@
         throw new Error(`${label}: unexpected machine id ${session.machineId}`);
       }
       const expectedOpfsPaths = {
-        ini: `linuxcnc/machines/${machineId}/machine.ini`,
-        parameters: `linuxcnc/machines/${machineId}/linuxcnc.var`,
-        toolTable: `linuxcnc/machines/${machineId}/tool.tbl`,
+        ini: opfsMachineFilePath(machineId, "machine.ini"),
+        parameters: opfsMachineFilePath(machineId, "linuxcnc.var"),
+        toolTable: opfsMachineFilePath(machineId, "tool.tbl"),
         ...(expectedPaths.opfs ?? {}),
       };
       assertOpfsIniStaging(