Fix incremental response

Author: wkh237

src/ios/RNFetchBlobFS.m

@@ -412,9 +412,9 @@ + (void) readFile:(NSString *)path encoding:(NSString *)encoding
             }
             else
             {
-                BOOL exists = [[NSFileManager defaultManager] fileExistsAtPath:path];
-                if(!exists) {
-                    reject(@"RNFetchBlobFS readFile error", @"file not exists", [[NSError alloc]init]);
+                if(![[NSFileManager defaultManager] fileExistsAtPath:path]) {
+                    
+                    reject(@"RNFetchBlobFS readFile error", @"file not exists", nil);
                     return;
                 }
                 fileContent = [NSData dataWithContentsOfFile:path];

src/ios/RNFetchBlobProgress.m

@@ -32,7 +32,7 @@ -(id)initWithType:(ProgressType)type interval:(NSNumber *)interval count:(NSNumb
 
 -(BOOL)shouldReport:(NSNumber *)nextProgress
 {
-    BOOL result = YES;
+    BOOL * result = YES;
     float countF = [self.count floatValue];
     if(countF > 0 && [nextProgress floatValue] > 0)
     {
@@ -43,7 +43,7 @@ -(BOOL)shouldReport:(NSNumber *)nextProgress
     // NSTimeInterval is defined as double
     NSNumber *timeStampObj = [NSNumber numberWithDouble: timeStamp];
     float delta = [timeStampObj doubleValue] - lastTick;
-    BOOL shouldReport = delta > [self.interval doubleValue] && self.enable && result;
+    BOOL * shouldReport = delta > [self.interval doubleValue] && self.enable && result;
     if(shouldReport)
     {
         tick++;