Fix an uninitialized variable added yesterday by [d27d34fb746280e7].

This problem was discovered overnight by 
[https://github.com/google/oss-fuzz|OSSFuzz].

FossilOrigin-Name: 6db4703f1178fc808f3a75c355fb6638fb12c88f6e1ce7f579e200ced8089114

manifest

@@ -1,5 +1,5 @@
-C Improve\sthe\sbytecode\sfor\sjoins\ssuch\sthat\sit\sexits\searlier\sif\sit\sdetermines\nthat\sno\soutput\sis\spossible.
-D 2025-07-02T11:47:54.123
+C Fix\san\suninitialized\svariable\sadded\syesterday\sby\s[d27d34fb746280e7].\nThis\sproblem\swas\sdiscovered\sovernight\sby\s\n[https://github.com/google/oss-fuzz|OSSFuzz].
+D 2025-07-03T11:52:17.583
 F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@ -785,7 +785,7 @@ F src/printf.c 71b6d3a0093bf23f473e25480ca0024e8962681506c75f4ffd3d343a3f0ab113
 F src/random.c 606b00941a1d7dd09c381d3279a058d771f406c5213c9932bbd93d5587be4b9c
 F src/resolve.c d40fe18d7c2fd0339f5846ffcf7d6809866e380acdf14c76fb2af87e9fe13f64
 F src/rowset.c 8432130e6c344b3401a8874c3cb49fefe6873fec593294de077afea2dce5ec97
-F src/select.c 0258c6c36372e64e3ecc5f9ed4ebb598c0688e112e28f9c9c0f9b61dc6500609
+F src/select.c 700e98061a61bf8e8b0f2707ed22ffc44c7a7b660dbf7c569430e04d2f95d8a5
 F src/shell.c.in 4f14a1f5196b6006abc8e73cc8fd6c1a62cf940396f8ba909d6711f35f074bb6
 F src/sqlite.h.in 5c54f2461a1ea529bab8499148a2b238e2d4bb571d59e8ea5322d0c190abb693
 F src/sqlite3.rc 015537e6ac1eec6c7050e17b616c2ffe6f70fca241835a84a4f0d5937383c479
@@ -2208,8 +2208,8 @@ F tool/version-info.c 3b36468a90faf1bbd59c65fd0eb66522d9f941eedd364fabccd7227350
 F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee87c1b31a7
 F tool/warnings.sh 1ad0169b022b280bcaaf94a7fa231591be96b514230ab5c98fbf15cd7df842dd
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P d27d34fb746280e7e81335db4e195914b15403ef0da7b2955550553dd78fbe9a 63306e447efb3ac17e789a331ed3bb65459eb8b79d66e9c185ba3bd852f34ce3
-R b92b209ccf559f2de96150026272807a
+P 2d2b61cba44a756a3a41ef5c95bbb0c0b7111f4b679c578fec9bd0b214cca367
+R 1edf105752f8a1297dddf11638994a45
 U drh
-Z 48380f5a742f367bd4ced6b10cb684be
+Z 4ca8b7187871a2cc09690de9bf418693
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-2d2b61cba44a756a3a41ef5c95bbb0c0b7111f4b679c578fec9bd0b214cca367
+6db4703f1178fc808f3a75c355fb6638fb12c88f6e1ce7f579e200ced8089114

src/select.c

@@ -5366,6 +5366,7 @@ static int pushDownWhereTerms(
       x.iTable = pSrc->iCursor;
       x.iNewTable = pSrc->iCursor;
       x.isOuterJoin = 0;
+      x.nSelDepth = 0;
       x.pEList = pSubq->pEList;
       x.pCList = findLeftmostExprlist(pSubq);
       pNew = substExpr(&x, pNew);