[PATCH] fortran/50524 -- Check return status of resolving substring ref

[Steve Kargl]

resolve_ref() calls resolve_substring() but failed to check
its return value.  This patch does the check.

2011-10-15  Steven G. Kargl  <kargl@gcc.gcu.org>

	* resolve.c (resolve_ref): Check return value of resolve_substring().

 
2011-10-15  Steven G. Kargl  <kargl@gcc.gcu.org>

	* gfortran.dg/substring_integer_index.f90: New test.
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