[libpng17] Fixed some misleading indentation (Krishnaraj Bhat).

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.7.0beta79 - February 14, 2016
+Libpng 1.7.0beta79 - March 7, 2016
 
 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.
@@ -1239,7 +1239,7 @@ Version 1.7.0beta78 [January 23, 2016]
     32 bits of address space when size_t/ptrdiff_t are 64 bit types.
   Revised workaround for false-positive Coverity issue in pngvalid.c.
 
-Version 1.7.0beta79 [February 14, 2016]
+Version 1.7.0beta79 [March 7, 2016]
   Only use exit(77) in configure builds.
   Corrected error in PNG_IMAGE_PNG_SIZE_MAX. This new macro underreported
     the palette size because it failed to take into account that the memory
@@ -1261,7 +1261,8 @@ Version 1.7.0beta79 [February 14, 2016]
     the application makes (previously low windowBits settings would get reset
     to higher values.)
   Changed PNG_INFO_cHNK and PNG_FREE_cHNK from 0xnnnn to 0xnnnnU in png.h
-   (Robert C. Seacord). Various other flags in png.h made unsigned as well.
+    (Robert C. Seacord). Various other flags in png.h made unsigned as well.
+  Fixed some misleading indentation (Krishnaraj Bhat).
 
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