Index: pipe.c
--- pipe.c.orig
+++ pipe.c
@@ -36,12 +36,13 @@ getnum(int r0, int c0, int rn, int cn, int fd)
 	for (c = c0, pp = ATBL(tbl, r, c); c <= cn; pp++, c++) {
 	    *line = '\0';
 	    p = *pp;
-	    if (p)
+	    if (p) {
 		if (p->cellerror)
 		    sprintf(line, "%s", (*pp)->cellerror == CELLERROR ?
 			    "ERROR" : "INVALID");
 		else if (p->flags & is_valid)
 		    sprintf(line, "%.15g", p->v);
+	    }
 	    if (c < cn)
 		strcat(line, "\t");
 	    else