Temporarily BR vala itself to build with the patch applied

vala.spec

@@ -3,7 +3,7 @@
 
 Name:           vala
 Version:        0.18.1
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        A modern programming language for GNOME
 
 # Most files are LGPLv2.1+, curses.vapi is 2-clause BSD
@@ -21,6 +21,9 @@ Source3:        emacs-vala-COPYING
 # Backported patch to ignore the "instance-parameter" tag emitted by g-ir-scanner
 Patch0:         0001-valagirparser-Ignore-the-new-instance-parameter-tag.patch
 
+# for patch0
+BuildRequires:  vala
+
 BuildRequires:  flex
 BuildRequires:  bison
 BuildRequires:  glib2-devel
@@ -132,6 +135,7 @@ the emacs-%{name} package to use Vala with GNU Emacs.
 
 %prep
 %setup -q
+%patch0 -p1
 
 
 %build
@@ -276,6 +280,9 @@ done
 
 
 %changelog
+* Wed Feb 20 2013 Kalev Lember <kalevlember@gmail.com> - 0.18.1-4
+- Temporarily BR vala itself to build with the patch applied
+
 * Wed Feb 20 2013 Kalev Lember <kalevlember@gmail.com> - 0.18.1-3
 - Ignore the "instance-parameter" tag emitted by new g-ir-scanner