ALL: Don't use character which are different in utf8 and latin*

extras/contrib/src/Makefile

@@ -1387,7 +1387,7 @@ libpng-$(PNG_VERSION).tar.bz2:
 libpng: libpng-$(PNG_VERSION).tar.bz2
 	$(EXTRACT_BZ2)
 ifdef HAVE_WIN32
-	(cd $@; cat ../Patches/libpng-1.2.5-win32.patch | sed s,££PREFIX££,$(PREFIX), | patch -p0)
+	(cd $@; cat ../Patches/libpng-1.2.5-win32.patch | sed s,??PREFIX??,$(PREFIX), | patch -p0)
 else
 	(cat Patches/libpng-osx.patch | sed -e 's%??PREFIX??%$(PREFIX)%' -e 's%??EXTRA_CFLAGS??%$(EXTRA_CFLAGS)%' -e 's%??EXTRA_LDFLAGS??%$(EXTRA_LDFLAGS)%' | patch -p0)
 endif

extras/contrib/src/Patches/libpng-1.2.5-win32.patch

@@ -15,14 +15,14 @@ diff -ur scripts/makefile.cygwin scripts/makefile.cygwin
  ifndef prefix
 -prefix=/usr
 -$(warning You haven't specified a 'prefix=' location. Defaulting to "/usr")
-+prefix=PREFIX
++prefix=??PREFIX??
  endif
  
  # Where the zlib library and include files are located
 -ZLIBLIB= /usr/lib
 -ZLIBINC=
-+ZLIBLIB= PREFIX/lib
-+ZLIBINC= PREFIX/include
++ZLIBLIB= ??PREFIX??/lib
++ZLIBINC= ??PREFIX??/include
  #ZLIBLIB=../zlib
  #ZLIBINC=../zlib