[Bug rtl-optimization/79856] New: rtl_verify_edges: use internal_error instead of error

["roland.illig at gmx dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79856

            Bug ID: 79856
           Summary: rtl_verify_edges: use internal_error instead of error
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: roland.illig at gmx dot de
  Target Milestone: ---

In cfgrtl.c, the calls to the "error" function contain a level of technical
details that is not useful for the GCC user.

Therefore these calls should be replaced with internal_error, and the strings
should not be marked for translation.