Add proper casts to silence VC warnings.

src/fmt_fp.c

@@ -160,7 +160,7 @@ fmt_fp(struct fmt_args *f, long double y, ptrdiff_t w, ptrdiff_t p, uint32_t fl,
     out(f, prefix, pl);
     out(f, ss, 3);
     pad(f, ' ', w, 3+pl, fl^LEFT_ADJ);
-    return MAX(w, 3+(int)pl);
+    return (int)MAX(w, 3+pl);
   }
 
   y = frexp((double)y, &e2) * 2;
@@ -215,7 +215,7 @@ fmt_fp(struct fmt_args *f, long double y, ptrdiff_t w, ptrdiff_t p, uint32_t fl,
     pad(f, '0', l-(ebuf-estr)-(s-buf), 0, 0);
     out(f, estr, ebuf-estr);
     pad(f, ' ', w, pl+l, fl^LEFT_ADJ);
-    return MAX(w, (int)pl+(int)l);
+    return (int)MAX(w, pl+l);
   }
   if (p<0) p=6;
 
@@ -366,7 +366,7 @@ fmt_fp(struct fmt_args *f, long double y, ptrdiff_t w, ptrdiff_t p, uint32_t fl,
 
   pad(f, ' ', w, pl+l, fl^LEFT_ADJ);
 
-  return MAX(w, (int)pl+(int)l);
+  return (int)MAX(w, pl+l);
 }
 
 static int
@@ -440,7 +440,7 @@ mrb_float_to_cstr(mrb_state *mrb, char *buf, size_t len, const char *fmt, mrb_fl
     mrb_raise(mrb, E_ARGUMENT_ERROR, "invalid format string");
   }
   *cstr.buf = '\0';
-  return cstr.buf - buf;
+  return (int)cstr.buf - buf;
 }
 #else   /* MRB_DISABLE_STDIO || _WIN32 || _WIN64 */
 #include <mruby.h>

src/hash.c

@@ -365,7 +365,7 @@ ht_put(mrb_state *mrb, htable *t, mrb_value key, mrb_value val)
       if (!seg->next && i >= t->last_len) {
         seg->e[i].key = key;
         seg->e[i].val = val;
-        t->last_len = i+1;
+        t->last_len = (uint16_t)i+1;
         t->size++;
         return;
       }
@@ -407,7 +407,7 @@ ht_put(mrb_state *mrb, htable *t, mrb_value key, mrb_value val)
   }
   seg->e[i].key = key;
   seg->e[i].val = val;
-  t->last_len = i+1;
+  t->last_len = (uint16_t)i+1;
   if (t->index == NULL && t->size > MRB_HT_INIT_SIZE*4) {
     ht_index(mrb, t);
   }