Fix bug in the construction of a base URL when it's specified as a file system path.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@381978 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/apps/FOUserAgent.java

@@ -434,10 +434,7 @@ public class FOUserAgent {
                 if (cfgBaseDir != null) {
                     File dir = new File(cfgBaseDir);
                     if (dir.isDirectory()) {
-                        cfgBaseDir = "file://" + dir.getCanonicalPath() 
-                            + System.getProperty("file.separator");
-                        cfgBaseDir = cfgBaseDir.replace(
-                                System.getProperty("file.separator").charAt(0), '/');
+                        cfgBaseDir = dir.toURL().toExternalForm(); 
                     } else {
                         //The next statement is for validation only
                         new URL(cfgBaseDir);