Minor clean up in output text for Liibrary Path

Signed-off-by: Russell McGuire <russell.w.mcguire@intel.com>

Author: rwmcguir

source/lib/ze_lib.cpp

@@ -107,8 +107,12 @@ namespace ze_lib
             loaderLibraryPath = readLevelZeroLoaderLibraryPath();
         }
 #endif
-        if (debugTraceEnabled)
-            debug_trace_message("Static Loader Using Loader Library Path: ", loaderLibraryPath);
+        if (debugTraceEnabled) {
+            if (loaderLibraryPath.empty())
+                debug_trace_message("Static Loader Using Loader Library Path: ", "Not set");
+            else
+                debug_trace_message("Static Loader Using Loader Library Path: ", loaderLibraryPath);
+        }
         std::string loaderFullLibraryPath = create_library_path(MAKE_LIBRARY_NAME( "ze_loader", L0_LOADER_VERSION), loaderLibraryPath.c_str());
         loader = LOAD_DRIVER_LIBRARY(loaderFullLibraryPath.c_str());
 

source/loader/ze_loader.cpp

@@ -643,8 +643,12 @@ namespace loader
             loaderLibraryPath = readLevelZeroLoaderLibraryPath();
         }
 #endif
-        if (debugTraceEnabled)
-            debug_trace_message("Using Loader Library Path: ", loaderLibraryPath);
+        if (debugTraceEnabled) {
+            if (loaderLibraryPath.empty())
+                debug_trace_message("Using Loader Library Path: ", "Not set");
+            else
+                debug_trace_message("Using Loader Library Path: ", loaderLibraryPath);
+        }            
 
         if (debugTraceEnabled && driverDDIPathDefault) {
             debug_trace_message("DDI Driver Extension Path is Enabled", "");