- own error with sound unpack operator using NULL pointer

- make stub now creates 'Release' build by default.

GNUmakefile

@@ -60,7 +60,7 @@ all:
 	if test ! -f $(BUILD_DIR)/CMakeCache.txt ; then \
 		mkdir -p $(BUILD_DIR) ; \
 		cd $(BUILD_DIR) ; \
-		cmake $(BLENDER_DIR) ; \
+		cmake $(BLENDER_DIR) -DCMAKE_BUILD_TYPE:STRING=Release ; \
 	fi
 
 	@echo 

source/blender/editors/sound/sound_ops.c

@@ -209,7 +209,7 @@ void SOUND_OT_pack(wmOperatorType *ot)
 static int sound_unpack_exec(bContext *C, wmOperator *op)
 {
 	int method= RNA_enum_get(op->ptr, "method");
-	bSound* sound;
+	bSound* sound= NULL;
 
 	/* find the suppplied image by name */
 	if (RNA_property_is_set(op->ptr, "id")) {