Fix another problem related to aggregate query LEFT JOIN flattening.

FossilOrigin-Name: 8e12c6f59bcb67be4ff131feecc5af68f4bb0afbcced2e2f7e73289aaf95d99d

diff --cc manifest
index 10030b8131f577f99eb8c6750fa58a95285e1d20,eeccada10ebb63fd71350f01aae5d9ee82c59f28..6408bbbc2e92d2532ef3cc10fd780a044cf97447
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Omit\sa\sunused\svariable\sinitialization\sin\sorder\sto\ssuppress\sa\sharmless\scompiler\nwarning.
- D 2022-07-26T15:41:34.792
 -C Add\stest\scases\srelated\sto\sfix\s[e717e029].
 -D 2022-07-26T15:39:32.378
++C Fix\sanother\sproblem\srelated\sto\saggregate\squery\sLEFT\sJOIN\sflattening.
++D 2022-07-26T18:43:45.800
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -1981,8 -1981,8 +1981,9 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 217fc3ebd423e050508d6af97e0664f301824ef9a997ed2d302c006a41227917
- R 407e9b273b183df6bef313b5323c800a
- U drh
- Z a0cbd446115797b84cb35ad185602ef9
 -P 2bda4fca06ab6be5ad02377a7d1fd9fb9586e3181f1052e4b4937958bdd45efe
 -R 12b2c22b8ec2610d9abb28e0edce627b
++P 2d703c5e941cac72efc21d58e1e35c446b338b2927a42f587ab788826fd7f3f1 2909f36bfba8f34b818e5d9ecd8c759f05bbe25765089e78bb022de2b77a4f0f
++R fd8805f95598ecc80e3e7fdb82e7f06b
++T +closed 2909f36bfba8f34b818e5d9ecd8c759f05bbe25765089e78bb022de2b77a4f0f
+ U dan
 -Z 31e4b968c08d2950ff44e5d5f67d5a40
++Z 98cbf6cf155acbce70008bbc87cc3bcc
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index 814b7ff643c2828291411c2f212f338abe3938d2,b7c6c8eb8311cba7d7b4092809b18eb44600106d..8ac3fc25207e44b97dbafe007daaf8e35a8767b1
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 2d703c5e941cac72efc21d58e1e35c446b338b2927a42f587ab788826fd7f3f1
 -2909f36bfba8f34b818e5d9ecd8c759f05bbe25765089e78bb022de2b77a4f0f
++8e12c6f59bcb67be4ff131feecc5af68f4bb0afbcced2e2f7e73289aaf95d99d