Fix error on Hardware status page

Setting default value for processors to an empty array to avoid
error "TypeError: Cannot read property 'length' of null" caused
when attempting to calculate the total table count on initial
load.

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Change-Id: I2e3af184f7f7649bed96cd4fd994fb3ee24ff28f
diff --git a/src/store/modules/Health/ProcessorStore.js b/src/store/modules/Health/ProcessorStore.js
index 8680f65..a1411eb 100644
--- a/src/store/modules/Health/ProcessorStore.js
+++ b/src/store/modules/Health/ProcessorStore.js
@@ -3,7 +3,7 @@
 const ProcessorStore = {
   namespaced: true,
   state: {
-    processors: null
+    processors: []
   },
   getters: {
     processors: state => state.processors