PATCH: fix for null pointer in wsdl2java

[Calvin Smith]

I was getting a nullpointer when I run wsdl2java.
here is the fix:
class: org.apache.axis.wsdl.symbolTable.SymbolTable
method: addMIMETypes
old code:
               if (obj instanceof MIMEContent) {
                   MIMEContent content = (MIMEContent) obj;
                   TypeEntry typeEntry = findPart(op, content.getPart());
                   String dims = typeEntry.getDimensions();
                   if(dims.length() <=0 && typeEntry.getRefType() != null) 
{
                       Node node = typeEntry.getRefType().getNode();
                       if(getInnerCollectionComponentQName(node)!=null)
                           dims += "[]";
                   }
                   String type = content.getType();
                   if(type == null || type.length() == 0)
                       type = "text/plain";
                   bEntry.setMIMEInfo(op.getName(), content.getPart(), 
type, dims);
               }

new code:
               if (obj instanceof MIMEContent) {
                   MIMEContent content = (MIMEContent) obj;
                   TypeEntry typeEntry = findPart(op, content.getPart());
                   String type = content.getType();
                   if(type == null || type.length() == 0)
                       type = "text/plain";
                   String dims;
                   if (typeEntry != null)
                   {
                     dims = typeEntry.getDimensions();
                     if(dims.length() <=0 && typeEntry.getRefType() != 
null) {
                         Node node = typeEntry.getRefType().getNode();
                         if(getInnerCollectionComponentQName(node)!=null)
                             dims += "[]";
                     }
                   }
                   else
                     dims = "[]";
                   bEntry.setMIMEInfo(op.getName(), content.getPart(), 
type, dims);
               }

and here is the offending wsdl.  if this wsdl is wrong and axis was right 
before just let me know.
<?xml version="1.0" encoding="UTF-8"?>

<definitions name="EchoService"
 targetNamespace="http://echo.test/";
 xmlns:tns="http://echo.test/";
 xmlns="http://schemas.xmlsoap.org/wsdl/";
 xmlns:xsd="http://www.w3.org/2001/XMLSchema";
 xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/";
 xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/";
 xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/";>
 <types/>

 <message name="doEchoRequest">
   <part name="name" type="xsd:string"/>
 </message>
 <message name="doEchoResponse">
   <part name="result" type="xsd:string"/>
 </message>
 <portType name="Echo">
   <operation name="doEcho" parameterOrder="name">
     <input message="tns:doEchoRequest"/>
     <output message="tns:doEchoResponse"/>
   </operation>
 </portType>
 <binding name="EchoBinding" type="tns:Echo">
   <soap:binding transport="http://schemas.xmlsoap.org/soap/http"; 
style="rpc" />
   <operation name="doEcho">
     <soap:operation soapAction="Echo"/>
     <input>
       <mime:multipartRelated>
         <mime:part>
           <soap:body use="encoded" namespace="http://echo.test/";
                      
encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"/>
         </mime:part>
         <mime:part>
           <mime:content part="attch" type="text/html"/>
         </mime:part>
       </mime:multipartRelated>
     </input>
     <output>
       <soap:body use="encoded" namespace="http://echo.test/";
             encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"/>
     </output>
   </operation>
 </binding>

 <service name="EchoService">
   <port name="Echo" binding="tns:EchoBinding">
     <soap:address location="http://127.0.0.1:1234/"/>
   </port>
 </service>
</definitions>

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