[grilo] core: Don't include private headers in introspection data

[Bastien Nocera <hadess src gnome org>]

commit 463d94d6022d3dd0acc8da8313ab10e01bfac7d9
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Nov 7 16:33:01 2016 +0100

    core: Don't include private headers in introspection data
    
    We should only use the C sources, not the private headers in the
    introspection, so as to avoid making private API available.

 src/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 36934e4..35ddd64 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -130,7 +130,7 @@ INTROSPECTION_COMPILER_ARGS = --includedir=$(srcdir) --includedir=$(srcdir)/data
 if HAVE_INTROSPECTION
 introspection_sources = \
        $(lib@GRL_NAME@inc_HEADERS)     \
-       $(lib@GRL_NAME@_la_SOURCES)
+       $(filter %.c,$(lib@GRL_NAME@_la_SOURCES))
 
 Grl-@GRL_MAJORMINOR@.gir: lib@GRL_NAME@.la
 Grl_@GRL_MAJORMINOR_NORM@_gir_INCLUDES = GObject-2.0 GModule-2.0 Gio-2.0