Renamed bot_developer to botDeveloper to prevent symbol clash.

qagame*.so has a variable named this too, and this confuses the Linux
 dynamic loader since we're not using -fvisibility=hidden.

 Fixes Bugzilla #3944.

code/botlib/be_ai_weight.c

@@ -422,7 +422,7 @@ weightconfig_t *ReadWeightConfig(char *filename)
 	//if the file was located in a pak file
 	botimport.Print(PRT_MESSAGE, "loaded %s\n", filename);
 #ifdef DEBUG
-	if (bot_developer)
+	if (botDeveloper)
 	{
 		botimport.Print(PRT_MESSAGE, "weights loaded in %d msec\n", Sys_MilliSeconds() - starttime);
 	} //end if