KT-1538 proper boolean invertion

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

@@ -468,8 +468,10 @@ public abstract class StackValue {
         private StackValue myOperand;
 
         private Invert(StackValue operand) {
-            super(operand.type);
+            super(Type.BOOLEAN_TYPE);
             myOperand = operand;
+            if(myOperand.type != Type.BOOLEAN_TYPE)
+                throw new UnsupportedOperationException("operand of ! must be boolean");
         }
 
         @Override

compiler/backend/src/org/jetbrains/jet/codegen/intrinsics/Not.java

@@ -38,6 +38,7 @@ public class Not implements IntrinsicMethod {
         else {
             stackValue = receiver;
         }
-        return StackValue.not(stackValue);
+        stackValue.put(Type.BOOLEAN_TYPE, v);
+        return StackValue.not(StackValue.onStack(Type.BOOLEAN_TYPE));
     }
 }