warpwarp.cpp: reverted sos overlay, not from a reference (nw)

src/mame/drivers/warpwarp.cpp

@@ -124,7 +124,13 @@ Address          Dir Data     Name      Description
 - There are images/videos on the net of kaitei and geebee running in 3bpp
   (aka 7 colors), this is assumed to be a homebrew repair or hack.
   Update: Gee Bee definitely uses an overlay while kaitei actually outputs 
-  colors depending on the monitor type used (color or b&w)
+  colors depending on the monitor type used (color or b&w).
+  sos is the odd one: it seems to be running in a b&w environment but a pic 
+  on the net shows it with reversed black and white compared to current 
+  implementation. 
+  Also the flyer shows the girl to be colorized purple, while the points 
+  numbers are in cyan and text in red (and this arrangement doesn't 
+  make much sense, different version maybe?).
 
 ***************************************************************************/
 
@@ -138,7 +144,6 @@ Address          Dir Data     Name      Description
 
 #include "geebee.lh"
 #include "navarone.lh"
-#include "sos.lh"
 
 #define MASTER_CLOCK        XTAL(18'432'000)
 
@@ -1049,7 +1054,7 @@ GAMEL(1978, geebeeg,    geebee,   geebee,   geebee,    warpwarp_state, geebee,
 GAMEL(1980, navarone,   0,        navarone, navarone,  warpwarp_state, navarone, ROT90, "Namco", "Navarone", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE, layout_navarone )
 GAME( 1980, kaitein,    kaitei,   kaitei,   kaitein,   warpwarp_state, kaitein,  ROT90, "K.K. Tokki (Namco license)", "Kaitei Takara Sagashi (Namco license)", MACHINE_SUPPORTS_SAVE ) // pretty sure it didn't have a color overlay
 GAME( 1980, kaitei,     0,        kaitei,   kaitei,    warpwarp_state, kaitei,   ROT90, "K.K. Tokki", "Kaitei Takara Sagashi", MACHINE_SUPPORTS_SAVE ) // "
-GAMEL( 1980, sos,        0,       navarone, sos,       warpwarp_state, sos,      ROT90, "Namco", "SOS", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE, layout_sos ) // developed by Shoei?
+GAME( 1980, sos,        0,        navarone, sos,       warpwarp_state, sos,      ROT90, "Namco", "SOS", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE ) // developed by Shoei? Flyer shows a Shoei logo.
 
 /* Color games */
 GAME( 1979, bombbee,    0,        bombbee,  bombbee,   warpwarp_state, bombbee,  ROT90, "Namco", "Bomb Bee", MACHINE_SUPPORTS_SAVE )