Fix ISE in ReflectJavaMember.getValueParameters on Java 6

The exception was incorrectly introduced in 0f0602230a. We should not
fail when `names` is null, only when there's no element at the
corresponding index. On Java 6, `names` is always null. On Java 8,
`names` is never null (it's an empty list if the class was compiled
without "-parameters")

core/descriptors.runtime/src/kotlin/reflect/jvm/internal/structure/ReflectJavaMember.kt

@@ -52,7 +52,9 @@ abstract class ReflectJavaMember : ReflectJavaElement(), ReflectJavaAnnotationOw
 
         for (i in parameterTypes.indices) {
             val type = ReflectJavaType.create(parameterTypes[i])
-            val name = names?.getOrNull(i + shift) ?: error("No parameter with index $i+$shift (name=$name type=$type) in $this")
+            val name = names?.run {
+                getOrNull(i + shift) ?: error("No parameter with index $i+$shift (name=$name type=$type) in $this@ReflectJavaMember")
+            }
             val isParamVararg = isVararg && i == parameterTypes.lastIndex
             result.add(ReflectJavaValueParameter(type, parameterAnnotations[i], name, isParamVararg))
         }