Fix MIPS Win64 emulation.

Change-Id: Icc79309463966625574f8b10e9f8c5e9d70b1a9c
diff --git a/target-mips/translate.c b/target-mips/translate.c
index 8db0a84..179791b 100755
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -2511,7 +2511,7 @@
         likely(!ctx->singlestep_enabled)) {
         tcg_gen_goto_tb(n);
         gen_save_pc(dest);
-        tcg_gen_exit_tb((long)tb + n);
+        tcg_gen_exit_tb((uintptr_t)tb + n);
     } else {
         gen_save_pc(dest);
         if (ctx->singlestep_enabled) {