layers: if no settings file or call overrides make callback override loging
Default debugAction in layers is to log based on variable init. Make the
overrides work as follows:
1) app calls xglRegisterMsgCallback()
2) settings file
3) Glave (or app) calls to setlayerOption()
diff --git a/layers/layers_config.h b/layers/layers_config.h
index 722f40d..7b608d7 100644
--- a/layers/layers_config.h
+++ b/layers/layers_config.h
@@ -23,13 +23,14 @@
*
**************************************************************************/
#pragma once
+#include <stdbool.h>
#ifdef __cplusplus
extern "C" {
#endif
const char *getLayerOption(const char *_option);
-uint32_t getLayerOptionEnum(const char *_option, uint32_t optionDefault);
+bool getLayerOptionEnum(const char *_option, uint32_t *optionDefault);
void setLayerOption(const char *_option, const char *_val);
void setLayerOptionEnum(const char *_option, const char *_valEnum);