Allow the task priorities to be overwritten.

Demo/Common/Minimal/blocktim.c

@@ -61,9 +61,14 @@
 /* Demo includes. */
 #include "blocktim.h"
 
-/* Task priorities. */
+/* Task priorities.  Allow these to be overridden. */
-#define bktPRIMARY_PRIORITY			( 3 )
+#ifndef bktPRIMARY_PRIORITY
-#define bktSECONDARY_PRIORITY		( 2 )
+	#define bktPRIMARY_PRIORITY			( 3 )
+#endif
+
+#ifndef bktSECONDARY_PRIORITY
+	#define bktSECONDARY_PRIORITY		( 2 )
+#endif
 
 /* Task behaviour. */
 #define bktQUEUE_LENGTH				( 5 )