Fix switch statements not adding SSA successors

Parser/src/main/java/org/openzen/zenscript/parser/statements/ParsedStatementSwitch.java

@@ -41,10 +41,11 @@ public CompilingStatement compile(StatementCompiler compiler, CodeBlock lastBloc
 		Compiling result = new Compiling(compiler, value, tail);
 		StatementCompiler innerScope = compiler.forLoop(result);
 
-		CodeBlock next = new CodeBlock();
+		CodeBlock next = lastBlock.createNext();
 		for (ParsedSwitchCase switchCase : cases) {
 			CodeBlock current = next;
-			next = new CodeBlock();
+			current.addSuccessor(tail);
+			next = lastBlock.createNext();
 			result.continueBlock = next;
 			result.cases.add(switchCase.compile(innerScope, current));
 		}

ScriptingEngineTester/src/main/resources/zencode_tests/statements/switch_1.zc

@@ -0,0 +1,12 @@
+#output: Hello World
+
+val field = "Hello World";
+
+switch field {
+	case "Hello World":
+		println("Hello World");
+		break;
+	case "Goodbye World":
+		println("this is bad");
+		break;
+}

ScriptingEngineTester/src/main/resources/zencode_tests/statements/switch_2.zc

@@ -0,0 +1,12 @@
+#output: Hello World
+
+val field = "Hello World";
+
+switch(field) {
+	case "Hello World":
+		println("Hello World");
+		break;
+	case "Goodbye World":
+		println("this is bad");
+		break;
+}

ScriptingEngineTester/src/main/resources/zencode_tests/statements/switch_3.zc

@@ -0,0 +1,14 @@
+#output: Hello World
+
+val field = "Hello World";
+
+if true {
+	switch field {
+		case "Hello World":
+			println("Hello World");
+			break;
+		case "Goodbye World":
+			println("this is bad");
+			break;
+	}
+}

ScriptingEngineTester/src/main/resources/zencode_tests/statements/switch_4.zc

@@ -0,0 +1,14 @@
+#output: Hello World
+
+val field = "Hello World";
+
+if false {} else {
+	switch field {
+		case "Hello World":
+			println("Hello World");
+			break;
+		case "Goodbye World":
+			println("this is bad");
+			break;
+	}
+}