fix getPackageHash

Author: geof90

CodePush.m

@@ -184,10 +184,11 @@ - (void)startRollbackTimer:(int)rollbackTimeout
                   rejecter:(RCTPromiseRejectBlock)reject)
 {
     NSError *error;
-    BOOL isFirstRun = (nil != packageHash
+    BOOL isFirstRun = didUpdate
+                  && nil != packageHash
                   && [packageHash length] > 0
-                  && [packageHash isEqualToString:[CodePushPackage getCurrentPackageHash:&error]]
-                  && didUpdate);
+                  && [packageHash isEqualToString:[CodePushPackage getCurrentPackageHash:&error]];
+                  
     resolve(@(isFirstRun));
 }
 

CodePushPackage.m

@@ -75,12 +75,20 @@ + (NSString *)getCurrentPackageFolderPath:(NSError **)error
 + (NSString *)getCurrentPackageHash:(NSError **)error
 {
     NSDictionary *info = [self getCurrentPackageInfo:error];
+    if (*error) {
+        return NULL;
+    }
+    
     return info[@"currentPackage"];
 }
 
 + (NSString *)getPreviousPackageHash:(NSError **)error
 {
     NSDictionary *info = [self getCurrentPackageInfo:error];
+    if (*error) {
+        return NULL;
+    }
+    
     return info[@"previousPackage"];
 }