genrecog: Address -Wsign-compare diagnostics.

genrecog: Address -Wsign-compare diagnostics.

    g++-4.6 [...] [...]/gcc/genrecog.c
    [...]/gcc/genrecog.c: In function 'state_size find_subroutines(routine_type, state*, vec<state*>&)':
    [...]/gcc/genrecog.c:3338:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    [...]/gcc/genrecog.c:3347:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    [...]/gcc/genrecog.c:3359:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    [...]/gcc/genrecog.c:3365:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

    3305   state_size size;
         [...]
    3337           state_size to_size = find_subroutines (type, trans->to, procs);
    3338           if (d->next && to_size.depth > MAX_DEPTH)
         [...]
    3347               if (to_size.num_statements < MIN_NUM_STATEMENTS)
         [...]
    3359   if (size.num_statements > MAX_NUM_STATEMENTS)
         [...]
    3365              && size.num_statements > MAX_NUM_STATEMENTS)

     175 static const int MAX_DEPTH = 6;
         [...]
     179 static const int MIN_NUM_STATEMENTS = 5;
         [...]
     185 static const int MAX_NUM_STATEMENTS = 200;
         [...]
    3258 struct state_size
    3259 {
         [...]
    3261   unsigned int num_statements;
         [...]
    3265   unsigned int depth;
    3266 };

	gcc/
	* genrecog.c (MAX_DEPTH, MIN_NUM_STATEMENTS, MAX_NUM_STATEMENTS):
	Change to unsigned int.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@223469 138bc75d-0d04-0410-961f-82ee72b054a4