Ticket 419: (search broken in editor/viewer on glib <2.14)

Added forgotten include of m4.include/ax_path_lib_pcre.m4 file

Signed-off-by: Slava Zanko <slavazanko@gmail.com>

acinclude.m4

@@ -1,4 +1,5 @@
 m4_include([m4.include/ac_onceonly.m4])
+m4_include([m4.include/ax_path_lib_pcre.m4])
 m4_include([m4.include/dx_doxygen.m4])
 m4_include([m4.include/mc-mcserver.m4])
 m4_include([m4.include/ac-get-fs-info.m4])