Generated c code is not compile with the vcc cl.exe before 2012 after v0.19

[slangmgh]

After the v0.19, the module init function contains code "{TFrame FR_; FR_.len = 0;}" before c variable define, and this is not allowed with classical c compiler.

This is code generated after v0.19:

N_LIB_PRIVATE N_NIMCALL(void, systemInit000)(void) {
{
	TFrame FR_; FR_.len = 0;
}
	int T1_;
	int T2_;
	int T3_;
nimRegisterThreadLocalMarker(TM_Q5wkpxktOdTGvlSRo9bzt9aw_17);
	genericReset((void*)(&strDesc_D0UzA4zsDu5tgpJQ9a9clXPg), (&NTI_TuG1vdYwChKtx4TOkRnAjw_));
	strDesc_D0UzA4zsDu5tgpJQ9a9clXPg.size = ((NI) 4);
	strDesc_D0UzA4zsDu5tgpJQ9a9clXPg.kind = ((tyEnum_TNimKind_jIBKr1ejBgsfM33Kxw4j7A) 28);
	strDesc_D0UzA4zsDu5tgpJQ9a9clXPg.flags = 2;
	T1_ = (int)0;
	T1_ = _fileno(stdin);
	_setmode(T1_, _O_BINARY);
	T2_ = (int)0;
	T2_ = _fileno(stdout);
	_setmode(T2_, _O_BINARY);
	T3_ = (int)0;
	T3_ = _fileno(stderr);
	_setmode(T3_, _O_BINARY);
	initAllocator_IZ2oOmqdsYQ7vixQGKSDcAsystem();
	initStackBottom();
	initGC_njssp69aa7hvxte9bJ8uuDcg();
	registerSignalHandler_njssp69aa7hvxte9bJ8uuDcg_2();
}

And this is the code generate before v0.19

N_LIB_PRIVATE N_NIMCALL(void, systemInit000)(void) {
	int T1_;
	int T2_;
	int T3_;
nimRegisterThreadLocalMarker(TM_Q5wkpxktOdTGvlSRo9bzt9aw_17);
	genericReset((void*)(&strDesc_D0UzA4zsDu5tgpJQ9a9clXPg), (&NTI_qQQlSworN6w6Qnxtmq0s5Q_));
	strDesc_D0UzA4zsDu5tgpJQ9a9clXPg.size = ((NI) 4);
	strDesc_D0UzA4zsDu5tgpJQ9a9clXPg.kind = ((tyEnum_TNimKind_jIBKr1ejBgsfM33Kxw4j7A) 28);
	strDesc_D0UzA4zsDu5tgpJQ9a9clXPg.flags = 2;
	T1_ = (int)0;
	T1_ = _fileno(stdin);
	_setmode(T1_, _O_BINARY);
	T2_ = (int)0;
	T2_ = _fileno(stdout);
	_setmode(T2_, _O_BINARY);
	T3_ = (int)0;
	T3_ = _fileno(stderr);
	_setmode(T3_, _O_BINARY);
	initAllocator_IZ2oOmqdsYQ7vixQGKSDcAsystem();
	initStackBottom();
	initGC_njssp69aa7hvxte9bJ8uuDcg();
	registerSignalHandler_njssp69aa7hvxte9bJ8uuDcg_2();
}

[slangmgh]

In the cgen.nim/genInitCode.
Should add "{" "}" around the following generated code.