Another #ifdef to omit code that is only used by STAT4.

FossilOrigin-Name: 445c75567de9bf9c8075dfc62c60dc4abeefab59c7803a5ef2cc5d69c08d7633

manifest

@@ -1,5 +1,5 @@
-C New\s#ifdefs\sto\somit\scode\sthat\sis\sunused\sexcept\sunder\sSTAT4.
-D 2023-03-29T14:42:11.580
+C Another\s#ifdef\sto\somit\scode\sthat\sis\sonly\sused\sby\sSTAT4.
+D 2023-03-29T15:16:29.589
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -701,7 +701,7 @@ F src/vdbeInt.h a4147a4ddf613cb1bcb555ace9e9e74a9c099d65facd88155f191b1fb4d74cfb
 F src/vdbeapi.c 40c47b1528d308a322203de21d2e0d711753257ed9771771b6129214b1d65932
 F src/vdbeaux.c 0f5201346a83a35a08e833c3a03abe626119c07b7361c28bc6a259b98540f1d6
 F src/vdbeblob.c 5e61ce31aca17db8fb60395407457a8c1c7fb471dde405e0cd675974611dcfcd
-F src/vdbemem.c cbd2305d6444dc0aa3ab0dbe8f45ca5166da6f5a9bb6402be9739b6443a83fd0
+F src/vdbemem.c db0458d11a51f6cfad2333a41e36a3795be0b2f316d070df5d33543a9ac884ac
 F src/vdbesort.c 43756031ca7430f7aec3ef904824a7883c4ede783e51f280d99b9b65c0796e35
 F src/vdbetrace.c fe0bc29ebd4e02c8bc5c1945f1d2e6be5927ec12c06d89b03ef2a4def34bf823
 F src/vdbevtab.c aae4bd769410eb7e1d02c42613eec961d514459b1c3c1c63cfc84e92a137daac
@@ -2051,8 +2051,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 7638d9755dc90fd353b874d03ed418fa8aaee4440290ff69b1b552eae84e5baa
-R b188963cb85e43486729f0b1a856004f
+P 09a9b30ba7828a487a33a3ebf8028dfaa147dff67d2724584123b90a88d9814b
+R 0b2f665677a5709c67b05890c7e30712
 U drh
-Z 5386f27a21d49b16511eaa8ce902e6c0
+Z 32665a8d3990ec1291de16f5a821ea1c
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-09a9b30ba7828a487a33a3ebf8028dfaa147dff67d2724584123b90a88d9814b
+445c75567de9bf9c8075dfc62c60dc4abeefab59c7803a5ef2cc5d69c08d7633

src/vdbemem.c

@@ -1587,7 +1587,13 @@ static int valueFromExpr(
     rc = valueFromExpr(db, pExpr->pLeft, enc, aff, ppVal, pCtx);
     testcase( rc!=SQLITE_OK );
     if( *ppVal ){
+#ifdef SQLITE_ENABLE_STAT4
       rc = ExpandBlob(*ppVal);
+#else
+      /* zero-blobs only come from functions, not literal values.  And
+      ** functions are only processed under STAT4 */
+      assert( (ppVal[0][0].flags & MEM_Zero)==0 );
+#endif
       sqlite3VdbeMemCast(*ppVal, aff, enc);
       sqlite3ValueApplyAffinity(*ppVal, affinity, enc);
     }