added default returns to generated enum functions

src/kwil_generate.c

@@ -196,6 +196,7 @@ int kwil_enum_generate_json_length(struct kwil_enum_t* self, FILE* file, const c
                 self->enum_values[option_index].name, strlen(self->enum_values[option_index].name));
     }
     fprintf(file, "    }\\\n"
+                  "    return 2;\\\n"
                   "}\\\n");
     return 0;
 }
@@ -213,6 +214,7 @@ int kwil_enum_generate_to_json(struct kwil_enum_t* self, FILE* file, const char*
     }
 
     fprintf(file, "    }\\\n"
+                  "    return sprintf(out, \"\\\"\\\"\");\\\n"
                   "}\\\n");
     return 0;
 }