Core: Fix many "errors"/warnings and coding style (1)

Extractors, worldserver, authserver, shared and collision affected

Errors were found using Cppcheck, open-source static analysis tool

src/server/shared/Utilities/Util.cpp

@@ -217,7 +217,7 @@ uint32 CreatePIDFile(const std::string& filename)
     pid_t pid = getpid();
 #endif
 
-    fprintf(pid_file, "%d", pid );
+    fprintf(pid_file, "%u", pid );
     fclose(pid_file);
 
     return (uint32)pid;