decompiler: major line numbers fixes

testData/results/TestCodeConstructs.dec

@@ -4,10 +4,26 @@ class TestCodeConstructs {
    private int count = 0;
 
    void expressions() {
-      (new String()).hashCode();
+      (new String()).hashCode();// 20
    }
 
    Integer fieldIncrement() {
-      return new Integer(this.count++);
+      return new Integer(this.count++);// 25
    }
 }
+
+class 'pkg/TestCodeConstructs' {
+   method 'expressions ()V' {
+      7      6
+   }
+
+   method 'fieldIncrement ()Ljava/lang/Integer;' {
+      6      10
+      b      10
+      12      10
+   }
+}
+
+Lines mapping:
+20 <-> 7
+25 <-> 11