re PR fortran/62076 (testsuite failure in udr2.90)

re PR fortran/62076 (testsuite failure in udr2.90)

	PR fortran/62076
	* openmp.c (gfc_match_omp_clauses): When failed to match
	operator name, defined op name or name, set buffer to
	empty string.  Don't call gfc_find_omp_udr if buffer is empty
	string.
	(gfc_match_omp_declare_reduction): Call gfc_undo_symbols ()
	before calling gfc_free_omp_udr.

From-SVN: r213971