Index: utils.c
===================================================================
--- utils.c	(revision 8070)
+++ utils.c	(working copy)
@@ -997,17 +997,15 @@
 {
 	char s;
 	size_t needed;
-	va_list ap1, ap2;
+	va_list ap;
 
-	va_start(ap1, format);
-	va_copy(ap2, ap1);
+	va_start(ap, format);
+	needed = vsnprintf(&s, 1, format, ap) + 1;
+	va_end(ap);	
 
-	needed = vsnprintf(&s, 1, format, ap1) + 1;
-
-	va_end(ap1);
-
-	if ((fields[index] = __ast_string_field_alloc_space(pool, needed, fields, num_fields)))
-		vsprintf((char *) fields[index], format, ap2);
-
-	va_end(ap2);
+	if ((fields[index] = __ast_string_field_alloc_space(pool, needed, fields, num_fields))) {
+		va_start(ap, format);
+		vsprintf((char *) fields[index], format, ap);
+		va_end(ap);
+	}
 }