Fix build on windows

Author: BrzVlad

src/mono/mono/metadata/class-init.c

@@ -1805,7 +1805,7 @@ mono_compress_bitmap (uint8_t *dest, const uint8_t *bitmap, int size)
 	while (bitmap < end) {
 		if (*bitmap || numz == 255) {
 			if (dest) {
-				*dest++ = numz;
+				*dest++ = (uint8_t)numz;
 				*dest++ = *bitmap;
 			}
 			res += 2;
@@ -1819,7 +1819,7 @@ mono_compress_bitmap (uint8_t *dest, const uint8_t *bitmap, int size)
 	if (numz) {
 		res += 2;
 		if (dest) {
-			*dest++ = numz;
+			*dest++ = (uint8_t)numz;
 			*dest++ = 0;
 		}
 	}

src/mono/mono/mini/type-checking.c

@@ -137,7 +137,7 @@ mini_emit_interface_bitmap_check (MonoCompile *cfg, int intf_bit_reg, int base_r
 #ifdef COMPRESSED_INTERFACE_BITMAP
 	MonoInst *args [2];
 	MonoInst *res, *ins;
-	NEW_LOAD_MEMBASE (cfg, ins, OP_LOAD_MEMBASE, ibitmap_reg, base_reg, offset);
+	NEW_LOAD_MEMBASE (cfg, ins, OP_LOAD_MEMBASE, ibitmap_reg, base_reg, (target_mgreg_t)offset);
 	MONO_ADD_INS (cfg->cbb, ins);
 	args [0] = ins;
 	args [1] = mini_emit_runtime_constant (cfg, MONO_PATCH_INFO_IID, klass);