From a343bc1c764c87b20edbdf960d870fd4b084ce8a Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 28 Jul 2011 09:04:45 -0400
Subject: RunSingleCommand: Avoid assignment in condition

Several compilers warn about this case even when an extra layer of
parenthesis surrounds the assignment.  Make the condition explicit.
---
 Source/cmSystemTools.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 1971610..03364bd 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -615,7 +615,7 @@ bool cmSystemTools::RunSingleCommand(std::vector<cmStdString>const& command,
   int pipe;
   if ( output || outputflag != OUTPUT_NONE )
     {
-    while((pipe = cmsysProcess_WaitForData(cp, &data, &length, 0)))
+    while((pipe = cmsysProcess_WaitForData(cp, &data, &length, 0)) > 0)
       {
       if(output || outputflag != OUTPUT_NONE)
         {
-- 
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