pfff: fix build on ocaml 4.03.

srcpkgs/pfff/template

@@ -1,7 +1,7 @@
 # Template build file for 'pfff'
 pkgname=pfff
 version=0.29
-revision=1
+revision=2
 build_style=configure
 configure_args="--prefix=/usr"
 short_desc="Tools and APIs for code analysis, visualization and transformation"
@@ -15,6 +15,12 @@ depends="ocaml"
 nocross="yes"
 nostrip="yes"
 
+post_extract() {
+	sed -i s/uint32/uint32_t/g external/ocamlzip/zlibstubs.c
+	sed -i '50,${/exception Error/d}' external/ocamlzip/zip.ml #duplicate def
+	sed -i 's/-warn-error .a//' Makefile.common lang_php/matcher/Makefile
+}
+
 do_build() {
 	make depend
 	make