[minor] Fix URL conversion to the file

possibly fixes the exception from https://stackoverflow.com/questions/57727150/kotlin-script-engine-with-spring-boot-self-running-war

libraries/scripting/jvm-host-test/test/kotlin/script/experimental/jvmhost/test/ClassPathTest.kt

@@ -52,7 +52,7 @@ class ClassPathTest : TestCase() {
                     + jar.toURI().toURL()).toTypedArray(),
             null
         )
-        val cp = cl.classPathFromTypicalResourceUrls().toList()
+        val cp = cl.classPathFromTypicalResourceUrls().toList().map { it.canonicalFile }
 
         Assert.assertTrue(cp.contains(jar.canonicalFile))
         for (el in emulatedClasspath) {

libraries/scripting/jvm/src/kotlin/script/experimental/jvm/impl/pathUtil.kt

@@ -94,10 +94,14 @@ fun tryGetResourcePathForClassByName(name: String, classLoader: ClassLoader): Fi
 
 internal fun URL.toFileOrNull() =
     try {
-        File(toURI().schemeSpecificPart).canonicalFile
+        File(toURI())
+    } catch (e: IllegalArgumentException) {
+        null
     } catch (e: java.net.URISyntaxException) {
+        null
+    } ?: run {
         if (protocol != "file") null
-        else File(file).canonicalFile
+        else File(file)
     }
 
 internal fun URL.toContainingJarOrNull(): File? =