Fix harmless compiler warning.

FossilOrigin-Name: 706373dcbe43752cf21604f278f96fb3015a36089ad64f069bb3a64bc526d137

manifest

@@ -1,5 +1,5 @@
-C CLI\sshell:\shandle\sthe\sspecial\scase\sof\s.prompt\s""\sto\snot\sincorrectly\sreport\sthat\sas\san\sOOM.\sReported\s[https://fossil-scm.org/forum/forumpost/ca277be73a|in\sthe\sFossil\sSCM\sforum].
-D 2026-04-23T14:05:36.810
+C Fix\sharmless\scompiler\swarning.
+D 2026-04-23T14:49:21.443
 F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@ -802,7 +802,7 @@ F src/upsert.c 215328c3f91623c520ec8672c44323553f12caeb4f01b1090ebdca99fdf7b4f1
 F src/utf.c 7267c3fb9e2467020507601af3354c2446c61f444387e094c779dccd5ca62165
 F src/util.c 377af5da226519a0f374dc3c6d408c9d303a92943e3ae5986432c7d52e6679a2
 F src/vacuum.c d3d35d8ae893d419ade5fa196d761a83bddcbb62137a1a157ae751ef38b26e82
-F src/vdbe.c 981719899b473de0c71b3559b7a313f280e1f4c1abf4eecded29867037d9cd05
+F src/vdbe.c 1cd55e8171e4e87054de196c3c4747d44b69041b5ec910cf547ae82a85beb3e4
 F src/vdbe.h 70e862ac8a11b590f8c1eaac17a0078429d42bc4ea3f757a9af0f451dd966a71
 F src/vdbeInt.h c31ba4dc8d280c2b1dc89c6fcee68f2555e3813ab34279552c20b964c0e338b1
 F src/vdbeapi.c 6cdcbe5c7afa754c998e73d2d5d2805556268362914b952811bdfb9c78a37cf1
@@ -2203,8 +2203,8 @@ F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee
 F tool/warnings.sh a554d13f6e5cf3760f041b87939e3d616ec6961859c3245e8ef701d1eafc2ca2
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
 F tool/winmain.c 00c8fb88e365c9017db14c73d3c78af62194d9644feaf60e220ab0f411f3604c
-P f0fc4e5ec334da3a1db8b0334e23d1911874c96675690da94210b2afb45f7307
-R 8d234e3b9433af1e3f0a80c9a4b0d7e1
-U stephan
-Z 6630d18578075877abd9f98362e99ff8
+P 3fa0500b964869c45f7b49717680b791049f7cd8c47a06a337dd22351d2002f9
+R 71b891a74b506696ae0597a74a57a86c
+U drh
+Z 6b30685bdb9a615afb7f74468ca1c1e4
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-3fa0500b964869c45f7b49717680b791049f7cd8c47a06a337dd22351d2002f9
+706373dcbe43752cf21604f278f96fb3015a36089ad64f069bb3a64bc526d137

src/vdbe.c

@@ -811,7 +811,7 @@ static SQLITE_NOINLINE int vdbeIndexKeyCompare(
 
   assert( pMem->flags & (MEM_Blob|MEM_Null) );
   nKey = sqlite3BtreePayloadSize(pCsr);
-  if( nKey==pMem->n && ALWAYS((pMem->flags & MEM_Blob)!=0) ){
+  if( nKey==(u32)pMem->n && ALWAYS((pMem->flags & MEM_Blob)!=0) ){
     /* This code could just use sqlite3BtreePayloadFetch(). But calling that
     ** function here apparently prevents compilers from inlining it in other,
     ** more performance critical, places. So this code uses