RFA: shrink main_type

[Tom Tromey]

>>>>> "Joel" == Joel Brobecker <brobecker@adacore.com> writes:

Joel> Looks good! Please commit.

Thanks.

dwarf2read.c needed the additional appended hunk in order to compile.
This file changed since I wrote this patch.  So, I am including this
in what I am going to commit.

Tom

***************
*** 5000,5006 ****
    TYPE_TARGET_TYPE (type) = target_type;
  
    if (name && strcmp (name, "char") == 0)
!     TYPE_FLAGS (type) |= TYPE_FLAG_NOSIGN;
  
    return set_die_type (die, type, cu);
  }
--- 5001,5007 ----
    TYPE_TARGET_TYPE (type) = target_type;
  
    if (name && strcmp (name, "char") == 0)
!     TYPE_NOSIGN (type) = 1;
  
    return set_die_type (die, type, cu);
  }