[libpng15] Removed "zTXt" from warning in generic chunk decompression function.

Bug report by Franke Busse

ANNOUNCE

 
-Libpng 1.5.7beta05 - November 18, 2011
+Libpng 1.5.7beta05 - November 19, 2011
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -99,7 +99,8 @@ Version 1.5.7beta04 [November 17, 2011]
     Also removed a duplicate setting of this flag.
   Added files that were omitted from the libpng-1.5.7beta03 zip distribution.
 
-Version 1.5.7beta05 [November 18, 2011]
+Version 1.5.7beta05 [November 19, 2011]
+  Removed "zTXt" from warning in generic chunk decompression function.
 
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CHANGES

@@ -3744,7 +3744,8 @@ Version 1.5.7beta04 [November 17, 2011]
     Also removed a duplicate setting of this flag.
   Added files that were omitted from the libpng-1.5.7beta03 zip distribution.
 
-Version 1.5.7beta05 [November 18, 2011]
+Version 1.5.7beta05 [November 19, 2011]
+  Removed "zTXt" from warning in generic chunk decompression function.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

pngrutil.c

@@ -490,7 +490,7 @@ png_decompress_chunk(png_structp png_ptr, int comp_type,
    {
       PNG_WARNING_PARAMETERS(p)
       png_warning_parameter_signed(p, 1, PNG_NUMBER_FORMAT_d, comp_type);
-      png_formatted_warning(png_ptr, p, "Unknown zTXt compression type @1");
+      png_formatted_warning(png_ptr, p, "Unknown compression type @1");
 
       /* The recovery is to simply drop the data. */
    }