Fixed Makefiles broken by rev 1197.

src/Makefile.linux32-wx-sdl2

@@ -17,7 +17,7 @@ sound_speaker.o sound_ssi2001.o sound_wss.o sound_ym7128.o soundopenal.o t1000.o
 timer.o um8669f.o um8881f.o vid_ati_eeprom.o vid_ati_mach64.o vid_ati18800.o vid_ati28800.o \
 vid_ati68860_ramdac.o vid_cga.o vid_cl5429.o vid_colorplus.o vid_compaq_cga.o vid_ega.o vid_et4000.o vid_et4000w32.o vid_genius.o vid_hercules.o \
 vid_icd2061.o vid_ics2595.o vid_incolor.o vid_mda.o vid_olivetti_m24.o vid_oti037.c vid_oti067.o vid_paradise.o vid_pc200.o \
-vid_pc1512.o vid_pc1640.o vid_pcjr.o vid_ps1_svga.o vid_s3.o vid_s3_virge.o vid_sdac_ramdac.o \
+vid_pc1512.o vid_pc1640.o vid_pcjr.o vid_ps1_svga.o vid_s3.o vid_s3_virge.o vid_sdac_ramdac.o vid_sigma.o \
 vid_stg_ramdac.o vid_svga.o vid_svga_render.o vid_t1000.o vid_t3100e.o vid_tandy.o vid_tandysl.o vid_tgui9440.o \
 vid_tkd8001_ramdac.o vid_tvga.o vid_unk_ramdac.o vid_vga.o vid_voodoo.o vid_wy700.o video.o wd76c10.o \
 x86seg.o x87.o xi8088.c xtide.o sound_dbopl.o sound_resid.o \