[LyX/master] Clarify message about an empty file

[Scott Kostyshak]

commit 6343d9941a63dbf788516eb325e589f70f06c6f1
Author: Scott Kostyshak <skost...@lyx.org>
Date:   Sat Feb 21 23:46:42 2015 -0500

    Clarify message about an empty file
    
    When empty output is generated, no PDF is produced. The previous
    message made it seem like an empty PDF was produced.

diff --git a/src/Converter.cpp b/src/Converter.cpp
index 4fa740e..a00b0f4 100644
--- a/src/Converter.cpp
+++ b/src/Converter.cpp
@@ -662,7 +662,7 @@ bool Converters::runLaTeX(Buffer const & buffer, string 
const & command,
                Alert::error(_("LaTeX failed"), str);
        } else if ((result & LaTeX::NO_OUTPUT) && !buffer.isClone()) {
                Alert::warning(_("Output is empty"),
-                              _("An empty output file was generated."));
+                              _("No output file was generated."));
        }