tests: build with klatt and speechplayer (#1557)

Ref: #1549

Makefile.am

 	${PCAUDIOLIB_CFLAGS} ${AM_CFLAGS}
 src_libespeak_ng_test_la_SOURCES = $(src_libespeak_ng_la_SOURCES)
 
+if OPT_KLATT
+src_libespeak_ng_test_la_CFLAGS  += -DINCLUDE_KLATT
+endif
+
+if OPT_SPEECHPLAYER
+src_libespeak_ng_test_la_CFLAGS  += -DINCLUDE_SPEECHPLAYER
+endif
+
 check_PROGRAMS += tests/encoding.test
 
 tests_encoding_test_LDADD   = src/libespeak-ng.la

src/libespeak-ng/sPlayer.c

 }
 
 void KlattFiniSP() {
-	speechPlayer_terminate(speechPlayerHandle);
+	if (speechPlayerHandle)
+		speechPlayer_terminate(speechPlayerHandle);
+	speechPlayerHandle = NULL;
 }
 
 void KlattResetSP() {

src/libespeak-ng/speech.c

 		p_decoder = NULL;
 	}
 
+	WavegenFini();
+
 	return ENS_OK;
 }