[libpng16] Fixed some typos in comments.
diff --git a/example.c b/example.c
index 9075e57..5422b6b 100644
--- a/example.c
+++ b/example.c
@@ -188,13 +188,13 @@
  *
  * Don't repeatedly convert between the 8-bit and 16-bit forms.  There is
  * significant data loss when 16-bit data is converted to the 8-bit encoding and
- * the current libpng implementation of convertion to 16-bit is also
+ * the current libpng implementation of conversion to 16-bit is also
  * significantly lossy.  The latter will be fixed in the future, but the former
  * is unavoidable - the 8-bit format just doesn't have enough resolution.
  */
 
 /* If your program needs more information from the PNG data it reads, or if you
- * need to do more complex transformations, or minimise transformations, on the
+ * need to do more complex transformations, or minimize transformations, on the
  * data you read, then you must use one of the several lower level libpng
  * interfaces.
  *
diff --git a/pngset.c b/pngset.c
index 667a020..8eb5f6e 100644
--- a/pngset.c
+++ b/pngset.c
@@ -1578,7 +1578,7 @@
     * It is possible for an indexed (color-type==3) PNG file to contain
     * pixels with invalid (out-of-range) indexes if the PLTE chunk has
     * fewer entries than the image's bit-depth would allow. We recover
-    * from this gracefully by filling any incomplete palette with zeroes
+    * from this gracefully by filling any incomplete palette with zeros
     * (opaque black).  By default, when this occurs libpng will issue
     * a benign error.  This API can be used to override that behavior.
     */
diff --git a/pngtest.c b/pngtest.c
index b3d6018..1dd4616 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -646,7 +646,7 @@
    if ((data->location[0] & what) || (data->location[1] & what))
       return 0; /* already have one of these */
 
-   /* Find where we are (the code below zeros info_ptr to indicate that the
+   /* Find where we are (the code below zeroes info_ptr to indicate that the
     * chunks before the first IDAT have been read.)
     */
    if (data->info_ptr == NULL) /* after IDAT */
@@ -1991,4 +1991,4 @@
 #endif
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_14beta08 Your_png_h_is_not_version_1_6_14beta08;
+typedef png_libpng_version_1_6_14rc01 Your_png_h_is_not_version_1_6_14rc01;