Revision 1735179

build system: Improve svn_error_symbolic_name()'s data gatherer.

* build/generator/gen_base.py
  (GeneratorBase.write_struct):
     Improve the "conflicting mappings" check.
     Clarify the warning message.

Found by: subhadarsan das <subhadarsan_das@yahoo.co.in>
(he ran into the unclear error message)