Fixed loading integral constants from compiled classes.

compiler/testData/loadJava/compiledKotlin/prop/Constants.kt

@@ -0,0 +1,17 @@
+//ALLOW_AST_ACCESS
+package test
+
+val b: Byte = 100
+val b1: Byte = 1
+val s: Short = 20000
+val s1: Short = 1
+val i: Int = 2000000
+val i1: Short = 1
+val l: Long = 2000000000000L
+val l1: Long = 1
+val f: Float = 3.14f
+val d: Double = 3.14
+val bb: Boolean = true
+val c: Char = '\u03c0' // pi symbol
+
+val str: String = ":)"