Fix for paramaccessor alias regression.

A binary incompatibility with 2.10.0 revealed a bug I had
introduced in c58647f.

Author: paulp

src/compiler/scala/tools/nsc/typechecker/Typers.scala

@@ -2037,7 +2037,7 @@ trait Typers extends Modes with Adaptations with Tags {
             val alias = (
               superAcc.initialize.alias
                 orElse (superAcc getter superAcc.owner)
-                filter (alias => superClazz.info.nonPrivateMember(alias.name) != alias)
+                filter (alias => superClazz.info.nonPrivateMember(alias.name) == alias)
             )
             if (alias.exists && !alias.accessed.isVariable) {
               val ownAcc = clazz.info decl name suchThat (_.isParamAccessor) match {

test/files/run/t7106.check

@@ -0,0 +1,6 @@
+[ok]              q1 I                              private final
+[ok]              q3 I                              private final
+[ok]          <init> (III)V                         public
+[ok]          bippy1 ()I                            public
+[ok]          bippy2 ()I                            public
+[ok]          bippy3 ()I                            public

test/files/run/t7106/Analyzed_1.scala

@@ -0,0 +1,14 @@
+
+abstract class Base0 { def p2: Int }
+class Base(p1: Int, override val p2: Int) extends Base0
+
+abstract class Sub1(q1: Int, q2: Int, q3: Int) extends Base(q1, q2) {
+  def bippy1 = q1
+  def bippy2 = q2
+  def bippy3 = q3
+}
+abstract class Sub2(q1: Int, q2: Int, q3: Int) extends Base(q1, q2) {
+  def bippy1 = q1
+  def bippy2 = p2
+  def bippy3 = q3
+}

test/files/run/t7106/test.scala

@@ -0,0 +1,10 @@
+import scala.tools.partest.BytecodeTest
+
+object Test extends BytecodeTest {
+  def show {
+    val node1 = loadClassNode("Sub1")
+    val node2 = loadClassNode("Sub2")
+
+    sameMethodAndFieldSignatures(node1, node2)
+  }
+}