Make use of rest operator in library_dylink.js. NFC (#21990)

Author: sbc100

src/library_dylink.js

@@ -73,32 +73,30 @@ var LibraryDylink = {
 #if !DISABLE_EXCEPTION_CATCHING || SUPPORT_LONGJMP == 'emscripten'
   $createInvokeFunction__internal: true,
   $createInvokeFunction__deps: ['$dynCall', 'setThrew', '$stackSave', '$stackRestore'],
-  $createInvokeFunction: (sig) => {
-    return function() {
-      var sp = stackSave();
-      try {
-        return dynCall(sig, arguments[0], Array.prototype.slice.call(arguments, 1));
-      } catch(e) {
-        stackRestore(sp);
-        // Create a try-catch guard that rethrows the Emscripten EH exception.
+  $createInvokeFunction: (sig) => (ptr, ...args) => {
+    var sp = stackSave();
+    try {
+      return dynCall(sig, ptr, args);
+    } catch(e) {
+      stackRestore(sp);
+      // Create a try-catch guard that rethrows the Emscripten EH exception.
 #if EXCEPTION_STACK_TRACES
-        // Exceptions thrown from C++ and longjmps will be an instance of
-        // EmscriptenEH.
-        if (!(e instanceof EmscriptenEH)) throw e;
+      // Exceptions thrown from C++ and longjmps will be an instance of
+      // EmscriptenEH.
+      if (!(e instanceof EmscriptenEH)) throw e;
 #else
-        // Exceptions thrown from C++ will be a pointer (number) and longjmp
-        // will throw the number Infinity. Use the compact and fast "e !== e+0"
-        // test to check if e was not a Number.
-        if (e !== e+0) throw e;
-#endif
-        _setThrew(1, 0);
-#if WASM_BIGINT        
-        // In theory this if statement could be done on
-        // creating the function, but I just added this to
-        // save wasting code space as it only happens on exception.
-        if (sig[0] == "j") return 0n;
-#endif        
-      }
+      // Exceptions thrown from C++ will be a pointer (number) and longjmp
+      // will throw the number Infinity. Use the compact and fast "e !== e+0"
+      // test to check if e was not a Number.
+      if (e !== e+0) throw e;
+#endif
+      _setThrew(1, 0);
+#if WASM_BIGINT
+      // In theory this if statement could be done on
+      // creating the function, but I just added this to
+      // save wasting code space as it only happens on exception.
+      if (sig[0] == "j") return 0n;
+#endif
     }
   },
 #endif
@@ -140,8 +138,7 @@ var LibraryDylink = {
       // `__cxa_find_matching_catch_` (see jsifier.js) that we know are needed,
       // but a side module loaded at runtime might need different/additional
       // variants so we create those dynamically.
-      sym = wasmImports[symName] = function() {
-        var args = Array.from(arguments);
+      sym = wasmImports[symName] = (...args) => {
 #if MEMORY64
         args = args.map(Number);
 #endif