Null pointer checks for music filenames

git-svn-id: https://svn.eduke32.com/eduke32@389 1a8010ca-5511-0410-912e-c29ae57300e0

polymer/eduke32/source/game.c

@@ -7853,15 +7853,18 @@ void nonsharedkeys(void)
             {
                 if (i == 5 && ps[myconnectindex].fta > 0 && ps[myconnectindex].ftq == 26)
                 {
-                    i = (VOLUMEALL?num_volumes*MAXLEVELS:6);
+                    i = (VOLUMEALL?MAXVOLUMES*MAXLEVELS:6);
                     music_select++;
                     while ((music_fn[0][(unsigned char)music_select] == NULL) && music_select < i)
                         music_select++;
                     if (music_select == i)
                         music_select = 0;
+                    if (music_fn[0][(unsigned char)music_select] != NULL)
+                    {
                         Bsprintf(fta_quotes[26],"PLAYING %s",&music_fn[0][(unsigned char)music_select][0]);
                         FTA(26,&ps[myconnectindex]);
                         playmusic(&music_fn[0][(unsigned char)music_select][0]);
+                    }
                     return;
                 }
 
@@ -8077,7 +8080,9 @@ FAKE_F3:
         if (KB_KeyPressed(sc_F5) && MusicDevice >= 0)
         {
             KB_ClearKeyDown(sc_F5);
+            if (music_fn[0][(unsigned char)music_select] != NULL)
                 Bstrcpy(fta_quotes[26],&music_fn[0][(unsigned char)music_select][0]);
+            else fta_quotes[26][0] = '\0';
             Bstrcat(fta_quotes[26],".  USE SHIFT-F5 TO CHANGE.");
             FTA(26,&ps[myconnectindex]);
         }

polymer/eduke32/source/gameexec.c

@@ -6532,6 +6532,7 @@ good:
     {
         insptr++;
         music_select=*insptr++;
+        if (music_fn[ud.volume_number][(unsigned char)music_select] != NULL)
             playmusic(&music_fn[ud.volume_number][(unsigned char)music_select][0]);
         break;
     }

polymer/eduke32/source/menus.c

@@ -3974,7 +3974,10 @@ cheat_for_port_credits:
                 else
                 {
                     if (ud.recstat != 2 && ps[myconnectindex].gm&MODE_GAME)
+                    {
+                        if (music_fn[0][(unsigned char)music_select] != NULL)
                             playmusic(&music_fn[0][(unsigned char)music_select][0]);
+                    }
                     else playmusic(&env_music_fn[0][0]);
 
                     MUSIC_Continue();

polymer/eduke32/source/premap.c

@@ -1750,6 +1750,7 @@ int enterlevel(char g)
     if (ud.recstat != 2)
     {
         music_select = (ud.volume_number*MAXLEVELS) + ud.level_number;
+        if (music_fn[0][(unsigned char)music_select] != NULL)
             playmusic(&music_fn[0][(unsigned char)music_select][0]);
     }
 

polymer/eduke32/source/savegame.c

@@ -354,6 +354,7 @@ int loadplayer(signed char spot)
     cacheit();
 
     music_select = (ud.volume_number*MAXLEVELS) + ud.level_number;
+    if (music_fn[0][(unsigned char)music_select] != NULL)
         playmusic(&music_fn[0][(unsigned char)music_select][0]);
 
     ps[myconnectindex].gm = MODE_GAME;

polymer/eduke32/source/sounds.c

@@ -208,6 +208,8 @@ void playmusic(char *fn)
     short      fp;
     long        l;
 
+    if (fn == NULL) return;
+
     if (MusicToggle == 0) return;
     if (MusicDevice < 0) return;
 
@@ -228,6 +230,8 @@ void playmusic(char *fn)
 #else
     void PlayMusic(char *_filename);
 
+    if (fn == NULL) return;
+
     if(MusicToggle == 0) return;
     if(MusicDevice < 0) return;