more "declared and not used".

the last round omitted := range and only
checked 1 out of N vars in a multi-var :=

R=r
OCL=34624
CL=34638
diff --git a/src/pkg/net/fd.go b/src/pkg/net/fd.go
index ec125f2..0f42239 100644
--- a/src/pkg/net/fd.go
+++ b/src/pkg/net/fd.go
@@ -244,8 +244,8 @@
 		}
 		if fd == s.pr.Fd() {
 			// Drain our wakeup pipe.
-			for nn, e := s.pr.Read(&scratch); nn > 0; {
-				nn, e = s.pr.Read(&scratch)
+			for nn, _ := s.pr.Read(&scratch); nn > 0; {
+				nn, _ = s.pr.Read(&scratch)
 			}
 
 			// Read from channels
@@ -327,7 +327,7 @@
 	if e != 0 {
 		return "";
 	}
-	addr, err := sockaddrToString(sa);
+	addr, _ := sockaddrToString(sa);
 	return addr;
 }
 
@@ -336,7 +336,7 @@
 	if e != 0 {
 		return "";
 	}
-	addr, err := sockaddrToString(sa);
+	addr, _ := sockaddrToString(sa);
 	return addr;
 }