fix for while-loop-ending-with-if bug

compiler/backend/src/org/jetbrains/jet/codegen/ExpressionCodegen.java

@@ -233,6 +233,9 @@ public class ExpressionCodegen extends JetVisitor<StackValue, StackValue> {
         condition.condJump(elseLabel, true, v);   // == 0, i.e. false
 
         Label end = continueLabel == null ? new Label() : continueLabel;
+        
+        if(continueLabel != null)
+            asmType = Type.VOID_TYPE;
 
         gen(thenExpression, asmType);
 

compiler/testData/codegen/controlStructures/ifInWhile.jet

@@ -0,0 +1,14 @@
+import java.lang.Runtime
+
+fun box() : String {
+    val processors = Runtime.getRuntime().sure().availableProcessors()
+    var threadNum = 1
+    while(threadNum <= 1024) {
+        System.out?.println(threadNum)
+        if(threadNum < 2 * processors)
+            threadNum += 1
+        else
+            threadNum *= 2
+    }
+    return "OK"
+}

compiler/tests/org/jetbrains/jet/codegen/ControlStructuresTest.java

@@ -244,6 +244,12 @@ public class ControlStructuresTest extends CodegenTestCase {
     public void testSynchronized() throws Exception {
         createEnvironmentWithFullJdk();
         blackBoxFile("controlStructures/sync.jet");
+//        System.out.println(generateToText());
+    }
+
+    public void testIfInWhile() throws Exception {
+        createEnvironmentWithFullJdk();
+        blackBoxFile("controlStructures/ifInWhile.jet");
 //        System.out.println(generateToText());
     }
 }