target/m68k: fix TCG variable double free

t64 is also unconditionally freed after the switch () { ... }
Signed-off-by: NLaurent Vivier <laurent@vivier.eu>
Reviewed-by: NThomas Huth <huth@tuxfamily.org>
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Message-Id: <20180119114444.7590-1-laurent@vivier.eu>

target/m68k/translate.c

@@ -969,7 +969,6 @@ static void gen_load_fp(DisasContext *s, int opsize, TCGv addr, TCGv_ptr fp)
     case OS_DOUBLE:
         tcg_gen_qemu_ld64(t64, addr, index);
         gen_helper_extf64(cpu_env, fp, t64);
-        tcg_temp_free_i64(t64);
         break;
     case OS_EXTENDED:
         if (m68k_feature(s->env, M68K_FEATURE_CF_FPU)) {