Parser: Fix recovery of constructor parameter list

#KT-4739 Fixed

compiler/testData/psi/recovery/MissingCommaInValueParameterListWithValOrVar.kt

@@ -0,0 +1,7 @@
+class Test(val a: Int var b: Int val c: Int) {
+    override fun toString() = "$a $b $c"
+}
+
+fun test(val a: Int var b: Int val c: Int) {
+
+}