fixed bug: 'isStatement' for function body == 'hasBlockBody'

not vice versa

compiler/testData/diagnostics/tests/controlStructures/ForbidStatementAsDirectFunctionBody.kt

@@ -0,0 +1,11 @@
+
+fun foo1() = <!EXPRESSION_EXPECTED!>while (b()) {}<!>
+
+fun foo2() = <!EXPRESSION_EXPECTED!>for (<!UNUSED_PARAMETER!>i<!> in <!ITERATOR_MISSING!>10<!>) {}<!>
+
+fun foo3() = when (b()) {
+    true -> 1
+    else -> 0
+}
+
+fun b(): Boolean = true

compiler/testData/diagnostics/tests/controlStructures/kt770.kt351.kt735_StatementType.kt

@@ -42,8 +42,8 @@ fun box() : Int {
 
 //More tests
 
-fun test1() = while(true) {}
-fun test2(): Unit = while(true) {}
+fun test1() { while(true) {} }
+fun test2(): Unit { while(true) {} }
 
 fun testCoercionToUnit() {
     val <!UNUSED_VARIABLE!>simple<!>: ()-> Unit = {

compiler/testData/diagnostics/tests/inference/regressions/kt2484.kt

@@ -3,7 +3,7 @@
 package a
 //+JDK
 
-fun <T> Array<T>.forEach(operation: (T) -> Unit) : Unit = for (element in this) operation(element)
+fun <T> Array<T>.forEach(operation: (T) -> Unit) : Unit { for (element in this) operation(element) }
 
 fun bar(operation: (String) -> Unit) = operation("")
 

compiler/testData/diagnostics/tests/operatorsOverloading/kt1028.kt

@@ -9,7 +9,7 @@ class event<T>()
 
     fun plusAssign(f : (T) -> Unit) = callbacks.add(f)
     fun minusAssign(f : (T) -> Unit) = callbacks.remove(f)
-    fun call(value : T) = for(c in callbacks) c(value)
+    fun call(value : T) { for(c in callbacks) c(value) }
 }
 
 class MouseMovedEventArgs()

compiler/testData/diagnostics/tests/regressions/kt385.109.441.kt

@@ -4,7 +4,7 @@
 
 import java.util.*
 
-fun <T> Iterator<T>.foreach(operation: (element: T) -> Unit)  : Unit = while(hasNext()) operation(next())
+fun <T> Iterator<T>.foreach(operation: (element: T) -> Unit)  : Unit { while(hasNext()) operation(next()) }
 
 fun <T> Iterator<T>.foreach(operation: (index: Int, element: T) -> Unit) : Unit {
     var k = 0