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[cc1] Re-emit tentative definitions

We need '(' at the end of definitions with initializer, but we cannot have it
if we don't emit again the definition.

--- a/cc1/init.c

+++ b/cc1/init.c

@@ -308,6 +308,7 @@

 			return;

 		}

 		sym->flags |= HASINIT;

+		sym->flags &= ~ISEMITTED;

 		emit(ODECL, sym);

 		emit(OINIT, np);

 		sym->flags |= ISDEFINED;

--- a/cc1/tests/test038.c

+++ b/cc1/tests/test038.c

@@ -6,7 +6,7 @@

 test038.c:43: error: redeclaration of 'x'

 output:

 G1	I	"x

-	(

+G1	I	"x	(

 	#I0

 )

 G5	F	"foo