add () for assignments

hdr.c

@@ -54,7 +54,7 @@ headerall(char *file)
 		return;
 
 	char *h = 0;
-	while (h = blaze822_next_header(msg, h))
+	while ((h = blaze822_next_header(msg, h)))
 		printhdr(h);
 }
 

thread.c

@@ -264,7 +264,7 @@ print_tree(struct container *c, int depth)
 	
 		if (c->child)
 			print_tree(c->child, depth+1);
-	} while (c = c->next);
+	} while ((c = c->next));
 }
 
 int