Ticket #4582: nullmd5fix.patch

engines/agi/saveload.cpp

@@ -99 +99 @@
         debugC(5, kDebugLevelMain | kDebugLevelSavegame, "Writing game id (%s, %s)", gameIDstring, _game.id);
 
         const char *tmp = getGameMD5();
-        for (i = 0; i < 32; i++)
-                out->writeByte(tmp[i]);
+        // MD5 can be null - if it is, just write zeros - we won't be doing a comparrison on load anyway
+        if (tmp)
+                for (i = 0; i < 32; i++)
+                        out->writeByte(tmp[i]);
+        else
+                for (i = 0; i < 32; i++)
+                        out->writeByte(0);
 
         for (i = 0; i < MAX_FLAGS; i++)
                 out->writeByte(_game.flags[i]);
@@ -316 +321 @@
 
                 debug(0, "Saved game MD5: %s", md5);
 
-                if (strcmp(md5, getGameMD5())) {
+                if (getGameMD5() && strcmp(md5, getGameMD5())) {
                         warning("Game was saved with different gamedata - you may encounter problems");
 
                         debug(0, "You have %s and save is %s.", getGameMD5(), md5);