fix build for JDK1.4 and earlier

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@349648 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/launch/Locator.java

@@ -138,8 +138,10 @@ public final class Locator {
         try {
             path = decodeUri(uri);
         } catch (UnsupportedEncodingException exc) {
-            // not sure whether this is clean, but this method is declared not to throw exceptions.
-            throw new IllegalStateException("Could not convert URI to path", exc);
+            // not sure whether this is clean, but this method is
+            // declared not to throw exceptions.
+            throw new IllegalStateException("Could not convert URI to path: "
+                                            + exc.getMessage());
         }
         return path;
     }