Try to print conan option as string.

Signed-off-by: Deukhoofd <Deukhoofd@gmail.com>

conanfile.py

@@ -25,7 +25,7 @@ class CreatureLibConan(ConanFile):
         if self.options.staticC:
             self.output.info("Linking C libraries statically")
             cmake.definitions["STATICC"] = "ON"
-        self.output.info("Using level size of: %x" % self.options.level_size)
+        self.output.info("Using level size of: %s" % self.options.level_size)
         cmake.definitions["LEVEL_SIZE"] = self.options.level_size;
 
         cmake.configure()