[libpng16] Removed some unnecessary brackets in pngrtran.c

ANNOUNCE

-Libpng 1.6.35beta01 - October 29, 2017
+Libpng 1.6.35beta01 - November 1, 2017
 
 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.
@@ -24,12 +24,12 @@ Other information:
 
 Changes since the last public release (1.6.34):
 
-Version 1.6.35beta01 [October 29, 2017]
+Version 1.6.35beta01 [November 1, 2017]
   Restored 21 of the contrib/pngsuite/i*.png, which do not cause test
     failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png.
   Added calls to png_set_*() transforms commonly used by browsers to
     the fuzzer.
-  Initialize trans_color.red, green, and blue == trans_color.gray
+  Removed some unnecessary brackets in pngrtran.c
 
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CHANGES

@@ -6038,14 +6038,14 @@ Version 1.6.33 [September 28, 2017]
   Add end_info structure and png_read_end() to the libpng fuzzer.
 
 Version 1.6.34 [September 29, 2017]
-  Removed contrib/pngsuite/i*.png; some of caused test failures.
+  Removed contrib/pngsuite/i*.png; some of them caused test failures.
 
-Version 1.6.35beta01 [October 29, 2017]
+Version 1.6.35beta01 [November 1, 2017]
   Restored 21 of the contrib/pngsuite/i*.png, which do not cause test
     failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png.
   Added calls to png_set_*() transforms commonly used by browsers to
     the fuzzer.
-  Initialize trans_color.red, green, and blue == trans_color.gray
+  Removed some unnecessary brackets in pngrtran.c
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit