[devel] Enabled 'attribute' warnings that are relevant to library APIs

  and callbacks.
Changed rules for generation of the various symbol files and added a new
  rule for a DEF file (which is also added to the distribution).
Updated the symbol file generation to stop it adding spurious spaces
  to EOL (coming from preprocessor macro expansion).  Added a facility
  to join tokens in the output and rewrite *.dfn to use this.
diff --git a/CHANGES b/CHANGES
index 5255628..d78c87b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2574,7 +2574,7 @@
     expressions (i.e. a trailing ';' must always be added) and correct
     the format statements in various png_debug messages.
 
-version 1.5.0beta14 [March 12, 2010]
+version 1.5.0beta14 [March 13, 2010]
   Removed direct access to png_ptr->io_ptr from the Windows code in pngtest.c
   Revised Makefile.am to account for recent additions and replacements.
   Corrected CE and OS/2 DEF files (scripts/png*def) for symbols removed and
@@ -2588,6 +2588,12 @@
     and appropriate changes made to all files.  Cygwin builds re-hinged to
     allow procedure call standard changes and to remove the need for the DEF
     file (fixes build on Cygwin).
+  Enabled 'attribute' warnings that are relevant to library APIs and callbacks.
+  Changed rules for generation of the various symbol files and added a new
+    rule for a DEF file (which is also added to the distribution).
+  Updated the symbol file generation to stop it adding spurious spaces
+    to EOL (coming from preprocessor macro expansion).  Added a facility
+    to join tokens in the output and rewrite *.dfn to use this.
 
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