Test for JET-68 + regression tests turned on

idea/testData/checker/regression/DoubleDefine.jet

@@ -16,7 +16,7 @@ fun evaluateArg(expr: AbstractStringBuilder, numbers: ArrayList<Int>): Int {
     val n = c - '0'
     if (!numbers.contains(n)) throw new Exception("You used incorrect number: " + n)
     numbers.remove(n)
-    return n                                                                                                                                       \
+    return n
   }
   throw new Exception("Syntax error: Unrecognized character " + c)
 }

idea/testData/checker/regression/Jet68.jet

@@ -0,0 +1,11 @@
+class Foo()
+
+fun test() {
+  val f : Foo? = null
+  if (f == null) {
+
+  }
+  if (f != null) {
+
+  }
+}

idea/testData/checker/regression/Jet69.jet

@@ -1,3 +1,5 @@
+class Command() {}
+
 fun parse(cmd: String): Command? { return null  }
 
 fun Any.equals(other : Any?) : Boolean = this === other

idea/tests/org/jetbrains/jet/checkers/JetPsiCheckerTest.java

@@ -23,6 +23,13 @@ public class JetPsiCheckerTest extends JetTestCaseBase {
                 return new JetPsiCheckerTest(dataPath, name);
             }
         }));
+        suite.addTest(JetTestCaseBase.suiteForDirectory(getTestDataPathBase(), "/checker/regression/", false, new JetTestCaseBase.NamedTestFactory() {
+            @NotNull
+            @Override
+            public Test createTest(@NotNull String dataPath, @NotNull String name) {
+                return new JetPsiCheckerTest(dataPath, name);
+            }
+        }));
         suite.addTest(JetTestCaseBase.suiteForDirectory(getTestDataPathBase(), "/checker/infos/", false, new JetTestCaseBase.NamedTestFactory() {
             @NotNull
             @Override