Fix the exit codes of checkrefs.py

source/tools/entity/checkrefs.py

@@ -145,7 +145,7 @@ class CheckRefs:
             if not validator.run():
                 self.inError = True
 
-        return self.inError
+        return not self.inError
 
     def get_mod_dependencies(self, *mods):
         modjsondeps = []

source/tools/xmlvalidator/validate_grammar.py

@@ -63,7 +63,7 @@ class RelaxNGValidator:
         self.validate_soundgroups()
         self.validate_terrains()
         self.validate_textures()
-        return self.inError
+        return not self.inError
 
     def main(self):
         """Program entry point, parses command line arguments and launches the validation"""

source/tools/xmlvalidator/validator.py

@@ -220,7 +220,7 @@ class Validator:
                 )
                 self.inError = True
 
-        return self.inError
+        return not self.inError
 
 
 if __name__ == "__main__":