This PR fixes a crash due to java.lang.IndexOutOfBoundsException: Index -1 out of bounds for length 0 when attempting to resolve a call to a method with only a single variadic parameter while providing no arguments, for example the foo call in:

public class Test {
  static String foo(String... values) { return null; }
  static void id(String value) { return null; }

  void test() {
    id(foo());
  }
}

This crash only occurs when attempting to resolve it via the MethodUsage code path, which is why the foo call is used as an argument to the id call. For the unit test, including all the code in the test code string didn't trigger this path either, so I added a test jar to be able to test this properly, along with the source and class file used to create the jar.

The fix is to check whether the argument list is empty (and return if it is) before attempting to match/replace type parameters using the actual argument types.