More cosmetic reformatting

Broke several remaining "if () statement;" and "else statement;" into
two lines.
diff --git a/pngwio.c b/pngwio.c
index 57a9719..59a2841 100644
--- a/pngwio.c
+++ b/pngwio.c
@@ -1,7 +1,7 @@
 
 /* pngwio.c - functions for data output
  *
- * Last changed in libpng 1.4.0 [May 20, 2009]
+ * Last changed in libpng 1.4.0 [May 31, 2009]
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -47,7 +47,8 @@
 {
    png_uint_32 check;
 
-   if (png_ptr == NULL) return;
+   if (png_ptr == NULL)
+      return;
    check = fwrite(data, 1, length, (png_FILE_p)(png_ptr->io_ptr));
    if (check != length)
       png_error(png_ptr, "Write Error");
@@ -68,7 +69,8 @@
    png_byte *near_data;  /* Needs to be "png_byte *" instead of "png_bytep" */
    png_FILE_p io_ptr;
 
-   if (png_ptr == NULL) return;
+   if (png_ptr == NULL)
+      return;
    /* Check if data really is near. If so, use usual code. */
    near_data = (png_byte *)CVT_PTR_NOCHECK(data);
    io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);