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

llvm-svn: 226851

lldb/source/Core/Error.cpp

@@ -146,7 +146,7 @@ void
 Error::Clear ()
 {
     m_code = 0;
-    m_type = eErrorTypeGeneric;
+    m_type = eErrorTypeInvalid;
     m_string.clear();
 }