fixing flag to properly enable/disable loguru

Author: jfrey-xx

src/common.cpp

@@ -40,7 +40,7 @@ void lsl::ensure_lsl_initialized() {
 		is_initialized = true;
 
 		loguru::g_stderr_verbosity = loguru::Verbosity_INFO;
-#ifdef LOGURU_DEBUG_LOGGING
+#if LOGURU_DEBUG_LOGGING
 		// Initialize loguru, mainly to print stacktraces on segmentation faults
 		int argc = 1;
 		const char *argv[] = {"liblsl", nullptr};