* create mu-error.h, update some functions to use GError for errors

src/tests/Makefile.am

@@ -19,7 +19,7 @@ include $(top_srcdir)/gtest.mk
 INCLUDES=$(XAPIAN_CXXFLAGS)					\
 	 $(GMIME_CFLAGS)					\
 	 $(GLIB_CFLAGS)						\
-	-I ${top_srcdir}					\
+	-I ${top_srcdir} -I ${top_srcdir}/src			\
 	-DMU_TESTMAILDIR=\"${abs_srcdir}/testdir/\"		\
 	-DMU_TESTMAILDIR2=\"${abs_srcdir}/testdir2/\"		\
 	-DMU_PROGRAM=\"${abs_top_builddir}/src/mu\"		\

src/tests/test-mu-cmd.c

@@ -113,7 +113,7 @@ test_mu_index (void)
 	xpath = g_strdup_printf ("%s%c%s", muhome, G_DIR_SEPARATOR,
 				 "xapian");
 	
-	store = mu_store_new (xpath);
+	store = mu_store_new (xpath, NULL);
 	g_assert (store);
 
 	g_assert_cmpuint (mu_store_count (store), ==, 4);