TOOLS: add FFTW_CFLAGS to build recent files including smfft.hh

Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>

Author: swesterfeld

tools/Makefile.am

@@ -1,6 +1,6 @@
 include $(top_srcdir)/Makefile.decl
 
-AM_CXXFLAGS += $(GLIB_CFLAGS) $(JACK_CFLAGS) $(SNDFILE_CFLAGS) -I$(top_srcdir)/lib -I$(top_srcdir)/src
+AM_CXXFLAGS += $(GLIB_CFLAGS) $(JACK_CFLAGS) $(FFTW_CFLAGS) $(SNDFILE_CFLAGS) -I$(top_srcdir)/lib -I$(top_srcdir)/src
 
 SPECTMORPH_LIBS = $(top_builddir)/lib/libspectmorph.la
 SPECTMORPH_GUI_LIBS = $(top_builddir)/gui/libspectmorphgui.la