compressor step is now optional

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40812

tools/builder/ABuilder.cs

@@ -173,6 +173,8 @@ namespace builder
 			}
 
 			string pkg_file = null;
+			if (cfg.Compressor != null)
+			{
 				if ((pkg_file=CompressPackage(pkg)) == null)
 				{
 					throw new System.Exception("Failed to compress package: " + pkg.GetPackageName());
@@ -194,4 +196,5 @@ namespace builder
 				File.Move(lpath, ltarget);
 			}
 		}
+	}
 }