don't try drawing snapshot in curses mode

Was crashing on game save. Add to main launchParams struct whether we're
in curses or gtk mode and only save snapshot in latter case.

xwords4/linux/gamesdb.c

@@ -263,7 +263,9 @@ summarize( CommonGlobals* cGlobals )
     sqlite3_finalize( stmt );
     XP_USE( result );
 
-    addSnapshot( cGlobals );
+    if ( !cGlobals->params->useCurses ) {
+        addSnapshot( cGlobals );
+    }
 }
 
 GSList*

xwords4/linux/linuxmain.c

@@ -2022,7 +2022,6 @@ dawg2dict( const LaunchParams* params, GSList* testDicts )
 int
 main( int argc, char** argv )
 {
-    XP_Bool useCurses;
     int opt;
     int totalPlayerCount = 0;
     XP_Bool isServer = XP_FALSE;
@@ -2127,9 +2126,9 @@ main( int argc, char** argv )
     /*     serverName = mainParams.info.clientInfo.serverName = "localhost"; */
 
 #if defined PLATFORM_GTK
-    useCurses = XP_FALSE;
+    mainParams.useCurses = XP_FALSE;
 #else  /* curses is the default if GTK isn't available */
-    useCurses = XP_TRUE;
+    mainParams.useCurses = XP_TRUE;
 #endif
 
     struct option* longopts = make_longopts();
@@ -2452,10 +2451,10 @@ main( int argc, char** argv )
 
 #if defined PLATFORM_GTK && defined PLATFORM_NCURSES
         case CMD_GTK:
-            useCurses = XP_FALSE;
+            mainParams.useCurses = XP_FALSE;
             break;
         case CMD_CURSES:
-            useCurses = XP_TRUE;
+            mainParams.useCurses = XP_TRUE;
             break;
 #endif
 #if defined PLATFORM_GTK
@@ -2643,7 +2642,7 @@ main( int argc, char** argv )
         /*     gi_initPlayerInfo( MPPARM(mainParams.mpool) &mainParams.pgi, NULL ); */
         /* } */
 
-        if ( useCurses ) {
+        if ( mainParams.useCurses ) {
             if ( mainParams.needsNewGame ) {
                 /* curses doesn't have newgame dialog */
                 usage( argv[0], "game params required for curses version" );

xwords4/linux/main.h

@@ -103,6 +103,7 @@ typedef struct LaunchParams {
     XP_Bool skipGameOver;
     XP_Bool useMmap;
     XP_Bool closeStdin;
+    XP_Bool useCurses;
     XP_Bool useUdp;
     XP_U16 splitPackets;
     XP_U16 chatsInterval;       /* 0 means disabled */