C-CON: Implement "ifplaybackon" conditional, used by World Tour to determine if the replay feature is enabled. In our case, it is always false.

git-svn-id: https://svn.eduke32.com/eduke32@5893 1a8010ca-5511-0410-912e-c29ae57300e0

polymer/eduke32/source/gamedef.c

@@ -576,6 +576,7 @@ const char *keyw[] =
     "for",                      // 396
     "nextsectorneighborz",      // 397
     "clamp",                    // 398
+    "ifplaybackon",             // 399
     "<null>"
 };
 #endif
@@ -5156,6 +5157,7 @@ repeatcase:
         case CON_IFAWAYFROMWALL:
         case CON_IFCANSEETARGET:
         case CON_IFNOSOUNDS:
+        case CON_IFPLAYBACKON:
             {
                 intptr_t offset;
                 intptr_t lastScriptPtr = (g_scriptPtr-&apScript[0]-1);

polymer/eduke32/source/gamedef.h

@@ -1128,6 +1128,7 @@ enum ScriptKeywords_t
     CON_FOR,                // 396
     CON_NEXTSECTORNEIGHBORZ,// 397
     CON_CLAMP,              // 398
+    CON_IFPLAYBACKON,       // 399
     CON_END
 };
 // KEEPINSYNC with the keyword list in lunatic/con_lang.lua

polymer/eduke32/source/gameexec.c

@@ -3719,6 +3719,10 @@ nullquote:
             VM_CONDITIONAL(g_netServer != NULL);
             continue;
 
+        case CON_IFPLAYBACKON:
+            VM_CONDITIONAL(0);
+            continue;
+
         case CON_OPERATE:
             insptr++;
             if (sector[vm.pSprite->sectnum].lotag == 0)