Error::Clear() should reset the type to invalid instead of generic.
Error::Clear() should reset the type to invalid instead of generic.

This matches the behavior of the default constructor, so is
technically more correct.

Patch by Chaoren Lin
Differential Revision: http://reviews.llvm.org/D7113

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@226851 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb