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cc1: Fix initialization of type for 0 and 1

The constants 0 and 1 are defined to have integer type,
but the integer type was not tet initialized at that
moment, making that the type of these constants was
a null pointer.

--- a/src/cmd/cc/cc1/amd64-sysv.c

+++ b/src/cmd/cc/cc1/amd64-sysv.c

@@ -200,8 +200,6 @@

 	arch.va_list_type = *mktype(&arch.va_type, ARY, 1, NULL);

 	arch.pvoidtype.type = &arch.chartype;

 	arch.valid_va_list = local_valid_va_list;

-	arch.zero.type = inttype;

-	arch.one.type = inttype;

 	return &arch;

 }

--- a/src/cmd/cc/cc1/arch.c

+++ b/src/cmd/cc/cc1/arch.c

@@ -80,4 +80,7 @@

 	va_type = &arch->va_type;

 	zero = &arch->zero;

 	one = &arch->one;

+

+	zero->type = inttype;

+	one->type = inttype;

 }

--- a/src/cmd/cc/cc1/z80-scc.c

+++ b/src/cmd/cc/cc1/z80-scc.c

@@ -205,8 +205,6 @@

 	arch.valid_va_list = local_valid_va_list;

 	arch.pvoidtype.type = &arch.chartype;

 	arch.va_type.type = &arch.inttype;

-	arch.zero.type = inttype;

-	arch.one.type = inttype;

 	return &arch;

 }