Fixed null comparison.

JavaBytecodeCompiler/src/main/java/org/openzen/zenscript/javabytecode/compiler/JavaExpressionVisitor.java

 					javaWriter.iSub();
 				}, PushOption.AFTER);
 				return null;
+			case OPTIONAL_IS_NULL:
+			case OPTIONAL_IS_NOT_NULL:
+				expression.target.accept(this);
+				final Label isFalse = new Label();
+				final Label end = new Label();
+
+				if(builtin == BuiltinID.OPTIONAL_IS_NULL)
+					javaWriter.ifNonNull(isFalse);
+				else
+					javaWriter.ifNull(isFalse);
+				javaWriter.iConst1();
+				javaWriter.goTo(end);
+				javaWriter.label(isFalse);
+				javaWriter.iConst0();
+				javaWriter.label(end);
+				return null;
 			default:
 				expression.target.accept(this);
 				for (Expression argument : expression.arguments.arguments) {
 				break;
 			case AUTOOP_NOTEQUALS:
 				throw new UnsupportedOperationException("Not yet supported!");
-			case OPTIONAL_IS_NULL:
-			case OPTIONAL_IS_NOT_NULL:
-				final Label isFalse = new Label();
-				final Label end = new Label();
-
-				if(builtin == BuiltinID.OPTIONAL_IS_NULL)
-					javaWriter.ifNonNull(isFalse);
-				else
-					javaWriter.ifNull(isFalse);
-				javaWriter.iConst1();
-				javaWriter.goTo(end);
-				javaWriter.label(isFalse);
-				javaWriter.iConst0();
-				javaWriter.label(end);
-				break;
 
 			default:
 				throw new UnsupportedOperationException("Unknown builtin: " + builtin);

JavaScripting/configuration.gradle

 group='org.openzen.zencode'
-version='0.1.0'
+version='0.2.0'

ScriptingExample/scripts/helloworld.zs

 println(1 + 3 as long);
 
 println(<hello world in bracket parser>);
+
+
+var a = null as string?;
+if (a == null)
+	println("A is null!");

common.gradle

 apply plugin: 'maven'
 
 String mavenGroupId = 'org.openzen.zencode'
-String mavenVersion = '0.1.2'
+String mavenVersion = '0.2.0'
 
 sourceCompatibility = '1.8'
 [compileJava, compileTestJava]*.options*.encoding = 'UTF-8'