Warnings during build

Hi

There is a large number of warnings during the gcj-based build of c3p0 (NB: I'm quite surprized that it's not compatible with openjdk though as I used c3p0 with Sun's JDK in the past and would have thought it's easier to use openjdk than gcj here).

I think the very high number of warnings deserves some work, upstream and/or in the packaging (I think using the proper source compat level would help with a bunch).

  [javadoc] WARNING: Cannot locate class java.lang.Object referenced in class com.mchange.v2.c3p0.AbstractConnectionCustomizer
  [javadoc] WARNING: Error while loading class Connection
  [javadoc] WARNING: Error while loading class SQLException
  [javadoc] WARNING: Error while loading class Method
=> a bit worrying; looks like that part is not started properly, or build-deps are missing

    [javac] 1. WARNING in /build/buildd/c3p0-0.9.1.2/relproj/debuggen/src/classes/com/mchange/v1/util/IteratorUtils.java (at line 31)
    [javac] public final static Iterator EMPTY_ITERATOR = new Iterator()
    [javac] ^^^^^^^^
    [javac] Iterator is a raw type. References to generic type Iterator<E> should be parameterized
=> you might want to use an older source compat level or use a parametrized iterator

    [javac] 2. WARNING in /build/buildd/c3p0-0.9.1.2/src/classes/com/mchange/v2/c3p0/codegen/BeangenDataSourceGe
    [javac] nerator.java (at line 71)
    [javac] protected void generateExtraSerInitializers(ClassInfo info, Class superclassType, Property[] props, Class[] propTypes, IndentedWriter iw)
    [javac]
    [javac] ^^^^^^^^^^^^^^
    [javac] The type IndentedWriter is deprecated
=>self refs to depreacted types

    [javac] 119. WARNING in /build/buildd/c3p0-0.9.1.2/src/classes/com/mchange/v2/log/MLog.java
    [javac] (at line 222)
    [javac] { instance().getLogger().exiting( srcClass, srcMeth, result ); }
    [javac] ^^^^^^^^^^^^^^^^^^^^^^
    [javac] The static method getLogger() from the type MLog should be accessed in a static way
=> certainly typos

    [javac] 132. WARNING in /build/buildd/c3p0-0.9.1.2/src/classes/com/mchange/v2/beans/BeansUtils.java (at line 202)
    [javac] boolean rethrow = false;
    [javac] ^^^^^^^
    [javac] The local variable rethrow is never read
=> certainly a bug

Thanks,