[gimp] Revert "plug-ins: clean out compilation warning about types used by libpng."

[Michael Natterer <mitch src gnome org>]

commit 4d4905cc0effd2c4a842b1dd22e248a435e451d5
Author: Michael Natterer <mitch gimp org>
Date:   Sat Jan 5 17:15:19 2013 +0100

    Revert "plug-ins: clean out compilation warning about types used by libpng."
    
    This reverts commit a02facf41e7ef1fd9a961689615b78e41e7e25ab.
    It broke the build against other libpng versions.

 plug-ins/common/file-png.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/plug-ins/common/file-png.c b/plug-ins/common/file-png.c
index 33892f6..d19f63f 100644
--- a/plug-ins/common/file-png.c
+++ b/plug-ins/common/file-png.c
@@ -1142,7 +1142,7 @@ load_image (const gchar  *filename,
     png_charp   profname, profile;
     int         profcomp;
 
-    if (png_get_iCCP (pp, info, &profname, &profcomp, (png_bytepp) &profile, &proflen))
+    if (png_get_iCCP (pp, info, &profname, &profcomp, &profile, &proflen))
       {
         GimpParasite *parasite;
 
@@ -1547,7 +1547,7 @@ save_image (const gchar  *filename,
 
         png_set_iCCP (pp, info,
                       profile_name ? profile_name : "ICC profile", 0,
-                      (png_const_bytep) gimp_parasite_data (profile_parasite),
+                      (gchar *) gimp_parasite_data (profile_parasite),
                       gimp_parasite_data_size (profile_parasite));
 
         g_free (profile_name);