Fix grammar error in dwarf2/attribute.h A recent patch of mine had a comment with bad grammar; apparently I didn't finish editing it. This patch cleans it up.

diff --git a/gdb/dwarf2/attribute.h b/gdb/dwarf2/attribute.h
index 4dce04d..ce6c563 100644
--- a/gdb/dwarf2/attribute.h
+++ b/gdb/dwarf2/attribute.h

@@ -105,8 +105,8 @@ struct attribute
   /* Return an unsigned constant value.  This only handles constant
      forms (i.e., form_is_constant -- and not the extended list of
      "unsigned" forms) and assumes an unsigned value is desired.  This
-     can intended for use with DWARF-defined enumerations like DW_CC_*
-     or DW_INL_*, but also in situations where a nonnegative constant
+     can be used with DWARF-defined enumerations like DW_CC_* or
+     DW_INL_*, but also in situations where a nonnegative constant
      integer is specified by DWARF.
 
      If a signed form and negative value is used, or if a non-constant