[devel] Revise the "#ifdef" blocks in png_inflate()

so it will compile when neither PNG_USER_CHUNK_MALLOC_MAX nor
PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED is defined.
diff --git a/ANNOUNCE b/ANNOUNCE
index f71624e..424eb16 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -86,6 +86,9 @@
 
 version 1.5.0beta13 [March 9, 2010]
   Protect pngstruct.h, pnginfo.h, and pngdebug.h from being included twice.
+  Revise the "#ifdef" blocks in png_inflate() so it will compile when neither
+    PNG_USER_CHUNK_MALLOC_MAX nor PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
+    is defined.
 
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