always clear the cached link, if there's another link coming in it ta…

…kes priority anyway

Sources/BranchSDK/Branch.m

@@ -1935,9 +1935,9 @@ - (void)initUserSessionAndCallCallback:(BOOL)callCallback sceneIdentifier:(NSStr
         } else {
             if (!urlString && self.cachedURLString) {
                 urlString = self.cachedURLString;
-                self.cachedURLString = nil;
                 [[BranchLogger shared] logDebug:[NSString stringWithFormat:@"Using cached link: %@", urlString]];
             }
+            self.cachedURLString = nil;
         }
     }