use default value of enums YGDirection and YGMeasureMode instead of -1

Summary:
Changelog:
[Internal][Yoga] YGDirection variable was initialized incorrectly by casting -1 to YGDirection. Changing it to default value of direction

Same for YGMeasureMode.

Reviewed By: pasqualeanatriello

Differential Revision: D20869042

fbshipit-source-id: 7bfe490193321baae875ef6fb49a938851950c9f

Author: SidharthGuglani-zz

ReactCommon/yoga/yoga/YGLayout.h

@@ -36,7 +36,7 @@ struct YGLayout {
   // Instead of recomputing the entire layout every single time, we cache some
   // information to break early when nothing changed
   uint32_t generationCount = 0;
-  YGDirection lastOwnerDirection = (YGDirection) -1;
+  YGDirection lastOwnerDirection = YGDirectionInherit;
 
   uint32_t nextCachedMeasurementsIndex = 0;
   std::array<YGCachedMeasurement, YG_MAX_CACHED_RESULT_COUNT>

ReactCommon/yoga/yoga/Yoga-internal.h

@@ -54,10 +54,10 @@ struct YGCachedMeasurement {
   float computedHeight;
 
   YGCachedMeasurement()
-      : availableWidth(0),
-        availableHeight(0),
-        widthMeasureMode((YGMeasureMode) -1),
-        heightMeasureMode((YGMeasureMode) -1),
+      : availableWidth(-1),
+        availableHeight(-1),
+        widthMeasureMode(YGMeasureModeUndefined),
+        heightMeasureMode(YGMeasureModeUndefined),
         computedWidth(-1),
         computedHeight(-1) {}
 

ReactCommon/yoga/yoga/Yoga.cpp

@@ -3821,8 +3821,10 @@ bool YGLayoutNodeInternal(
   if (needToVisitNode) {
     // Invalidate the cached results.
     layout->nextCachedMeasurementsIndex = 0;
-    layout->cachedLayout.widthMeasureMode = (YGMeasureMode) -1;
-    layout->cachedLayout.heightMeasureMode = (YGMeasureMode) -1;
+    layout->cachedLayout.availableWidth = -1;
+    layout->cachedLayout.availableHeight = -1;
+    layout->cachedLayout.widthMeasureMode = YGMeasureModeUndefined;
+    layout->cachedLayout.heightMeasureMode = YGMeasureModeUndefined;
     layout->cachedLayout.computedWidth = -1;
     layout->cachedLayout.computedHeight = -1;
   }