Revert of Remove unecessary non fatal error statement that very often is printed in the PSNR or SSIM metric n… (patchset #1 id:1 of https://codereview.webrtc.org/2901793002/ )

Reason for revert:
Looks like we need the return there after all: derefence error in: https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Fclient.webrtc.perf%2FAndroid64_Tests__L_Nexus9_%2F2967%2F%2B%2Frecipes%2Fsteps%2Fvideo_quality_loopback_test%2F0%2Fstdout

Original issue's description:
> Remove unecessary non fatal error statement that very often is printed in the PSNR or SSIM metric numbered list
>
> BUG=webrtc:7698
> NOTRY=TRUE
>
> Review-Url: https://codereview.webrtc.org/2901793002
> Cr-Commit-Position: refs/heads/master@{#18234}
> Committed: 18d023f9ee

TBR=kjellander@webrtc.org,oprypin@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7698

Review-Url: https://codereview.webrtc.org/2899973004
Cr-Commit-Position: refs/heads/master@{#18239}

webrtc/tools/frame_analyzer/video_quality_analysis.cc

@@ -460,6 +460,10 @@ void PrintMaxRepeatedAndSkippedFrames(FILE* output,
       }
       continue;
     }
+    fprintf(stderr,
+            "Found barcode %d in test video, which is not in reference video",
+            it_test->first);
+    return;
   }
 
   fprintf(output, "RESULT Max_repeated: %s= %d\n", label.c_str(),