libotr3: add missing depends to -devel pkg.

srcpkgs/libotr3/template

@@ -1,7 +1,7 @@
 # Template build file for 'libotr3'.
 pkgname=libotr3
 version=3.2.1
-revision=1
+revision=2
 wrksrc="libotr-${version}"
 build_style=gnu-configure
 configure_args="--program-transform-name='s/otr/otr3/'"
@@ -29,6 +29,7 @@ libotr3-progs_package() {
 }
 
 libotr3-devel_package() {
+	depends="${sourcepkg}-${version}_${revision}"
 	short_desc+=" - development files"
 	pkg_install() {
 		vmove usr/include