Added support for <classifier> in makePom

Avoid second call to getExtraAttribute

ivy/MakePom.scala

@@ -132,6 +132,7 @@ class MakePom(val log: Logger)
 			<artifactId>{mrid.getName}</artifactId>
 			<version>{mrid.getRevision}</version>
 			{ scopeAndOptional(dependency) }
+			{ classifier(dependency) }
 			{
 				val (warns, excls) = List.separate(excl.map(makeExclusion))
 				if(!warns.isEmpty) log.warn(warns.mkString(IO.Newline))
@@ -144,6 +145,13 @@ class MakePom(val log: Logger)
 		</dependency>
 	}
 
+	def classifier(dependency: DependencyDescriptor): Seq[scala.xml.Node] =
+	{
+		for (da <- dependency.getAllDependencyArtifacts;
+				 cl <- Option(da.getExtraAttribute("classifier"))) yield
+					<classifier>{cl}</classifier>
+	}
+
 	def scopeAndOptional(dependency: DependencyDescriptor): NodeSeq  =
 	{
 		val (scope, opt) = getScopeAndOptional(dependency.getModuleConfigurations)
@@ -238,4 +246,4 @@ class MakePom(val log: Logger)
 		}
 		module.getDependencies flatMap translate
 	}
-}
+}