[cfe-dev] Fix paste avoidance

[Neil Booth]

Apparently a logic bug; confused how it was working for anyone
else.

Neil.

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Index: Driver/PrintPreprocessedOutput.cpp
===================================================================
--- Driver/PrintPreprocessedOutput.cpp	(revision 40450)
+++ Driver/PrintPreprocessedOutput.cpp	(working copy)
@@ -540,7 +540,7 @@
     } else if (Tok.hasLeadingSpace() || 
                // If we haven't emitted a token on this line yet, PrevTok isn't
                // useful to look at and no concatenation could happen anyway.
-               (!Callbacks->hasEmittedTokensOnThisLine() &&
+               (Callbacks->hasEmittedTokensOnThisLine() &&
                 // Don't print "-" next to "-", it would form "--".
                 Callbacks->AvoidConcat(PrevTok, Tok))) {
       OutputChar(' ');