Fix building with libpng 1.5.

Thanks to David C. Rankin and /dev/ammo42.

kipi-plugins/rawconverter/rawdecodingiface.cpp

@@ -68,6 +68,12 @@ extern "C"
 namespace KIPIRawConverterPlugin
 {
 
+#if PNG_LIBPNG_VER_MAJOR > 1 || ( PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR >= 5 )
+  typedef png_bytep iCCP_data;
+#else
+  typedef png_charp iCCP_data;
+#endif
+
 RawDecodingIface::RawDecodingIface()
                 : KDcrawIface::KDcraw()
 {
@@ -249,7 +255,7 @@ bool RawDecodingIface::loadedFromDcraw(const TQString& filePath,
             jpeg_set_quality(&cinfo, 99, true);
             jpeg_start_compress(&cinfo, true);
 
-            // Write ICC color profil.
+            // Write ICC color profile.
             if (!ICCColorProfile.isEmpty())
                 write_icc_profile (&cinfo, (JOCTET *)ICCColorProfile.data(), ICCColorProfile.size());
 
@@ -295,11 +301,16 @@ bool RawDecodingIface::loadedFromDcraw(const TQString& filePath,
             png_set_sBIT(png_ptr, info_ptr, &sig_bit);
             png_set_compression_level(png_ptr, 9);
 
-            // Write ICC profil.
+            // Write ICC profile.
             if (!ICCColorProfile.isEmpty())
             {
+#if PNG_LIBPNG_VER_MAJOR > 1 || ( PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR >= 5 )
+                png_set_iCCP(png_ptr, info_ptr, ("icc"), PNG_COMPRESSION_TYPE_BASE,
+                             reinterpret_cast<iCCP_data>(ICCColorProfile.data()), ICCColorProfile.size());
+#else
                 png_set_iCCP(png_ptr, info_ptr, "icc", PNG_COMPRESSION_TYPE_BASE, 
                              ICCColorProfile.data(), ICCColorProfile.size());
+#endif
             }
 
             TQString libpngver(PNG_HEADER_VERSION_STRING);