Remove limits.h from numeric.h. Add limits.h to some C files.

include/mruby/numeric.h

@@ -11,8 +11,6 @@
 extern "C" {
 #endif
 
-#include <limits.h>
-
 #define POSFIXABLE(f) ((f) <= MRB_INT_MAX)
 #define NEGFIXABLE(f) ((f) >= MRB_INT_MIN)
 #define FIXABLE(f) (POSFIXABLE(f) && NEGFIXABLE(f))

mrbgems/mruby-numeric-ext/src/numeric_ext.c

+#include <limits.h>
 #include "mruby.h"
 #include "mruby/numeric.h"
 

mrbgems/mruby-sprintf/src/sprintf.c

@@ -6,6 +6,7 @@
 
 #include "mruby.h"
 
+#include <limits.h>
 #include <stdio.h>
 #include <string.h>
 #include "mruby/string.h"

src/numeric.c

@@ -13,6 +13,7 @@
 #include <math.h>
 #include <assert.h>
 #include <stdlib.h>
+#include <limits.h>
 
 #if defined(__FreeBSD__) && __FreeBSD__ < 4
 #include <floatingpoint.h>