Fix warning from VC regarding implicit int conversion.

mrbgems/mruby-eval/src/eval.c

@@ -20,7 +20,7 @@ create_proc_from_string(mrb_state *mrb, const char *s, mrb_int len, mrb_value bi
   struct REnv *e;
   mrb_callinfo *ci; /* callinfo of eval caller */
   struct RClass *target_class = NULL;
-  int bidx;
+  mrb_int bidx;
 
   if (!mrb_nil_p(binding)) {
     mrb_raise(mrb, E_ARGUMENT_ERROR, "Binding of eval must be nil.");

mrbgems/mruby-print/src/print.c

@@ -17,22 +17,22 @@
 #endif
 
 static void
-printstr(mrb_state *mrb, const char *p, size_t len)
+printstr(mrb_state *mrb, const char *p, mrb_int len)
 {
 #if defined(_WIN32)
   if (isatty(fileno(stdout))) {
     DWORD written;
-    size_t wlen = MultiByteToWideChar(CP_UTF8, 0, p, len, NULL, 0);
+    int wlen = MultiByteToWideChar(CP_UTF8, 0, p, (int)len, NULL, 0);
     wchar_t* utf16 = (wchar_t*)mrb_malloc(mrb, (wlen+1) * sizeof(wchar_t));
     if (MultiByteToWideChar(CP_UTF8, 0, p, len, utf16, wlen) > 0) {
       utf16[wlen] = 0;
       WriteConsoleW(GetStdHandle(STD_OUTPUT_HANDLE),
-                    utf16, wlen, &written, NULL);
+                    utf16, (DWORD)wlen, &written, NULL);
     }
     mrb_free(mrb, utf16);
   } else
 #endif
-    fwrite(p, len, 1, stdout);
+    fwrite(p, (size_t)len, 1, stdout);
   fflush(stdout);
 }
 

mrbgems/mruby-rational/src/rational.c

@@ -115,7 +115,7 @@ rational_new_f(mrb_state *mrb, mrb_float f0)
 
   if (f < 0) { neg = 1; f = -f; }
   while (f != floor(f)) { n <<= 1; f *= 2; }
-  d = f;
+  d = (mrb_int)f;
  
   /* continued fraction and check denominator each step */
   for (i = 0; i < 64; i++) {

src/vm.c

@@ -223,7 +223,7 @@ mrb_stack_extend(mrb_state *mrb, mrb_int room)
 }
 
 static inline struct REnv*
-uvenv(mrb_state *mrb, int up)
+uvenv(mrb_state *mrb, mrb_int up)
 {
   const struct RProc *proc = mrb->c->ci->proc;
   struct REnv *e;