[babl] Fix make distcheck

[Martin Nordholts <martinn src gnome org>]

commit cfeaaf62b8d5babef2ab34798fff1e1f64905422
Author: Martin Nordholts <martinn src gnome org>
Date:   Wed Dec 29 08:25:50 2010 +0100

    Fix make distcheck
    
    When we generate the gir-file we need to refer to the source files
    relative to the srcdir to support out-of-source-tree builds.

 babl/Makefile.am |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/babl/Makefile.am b/babl/Makefile.am
index 1823265..6abf148 100644
--- a/babl/Makefile.am
+++ b/babl/Makefile.am
@@ -99,8 +99,8 @@ Babl-$(BABL_API_VERSION).gir: $(G_IR_SCANNER) $(library_include_HEADERS) $(c_sou
             -DBABL_IS_BEING_COMPILED \
 	    -I$(top_srcdir) \
 	    -I$(top_builddir) \
-	    $(library_include_HEADERS) \
-	    $(c_sources)
+	    $(addprefix $(srcdir)/, $(library_include_HEADERS)) \
+	    $(addprefix $(srcdir)/, $(c_sources))
 
 girdir = $(datadir)/gir-1.0
 gir_DATA = Babl-$(BABL_API_VERSION).gir