Fix a harmless uninitialized variable warning in MSVC.

FossilOrigin-Name: b870d2a2fa54ddab6ffc9b9d95f52420a5a6831aeb73dac75355ca1ab15a190e

manifest

@@ -1,5 +1,5 @@
-C Fix\sharmless\scompiler\swarnings\sin\sthe\sCLI.
-D 2022-04-21T19:14:23.704
+C Fix\sa\sharmless\suninitialized\svariable\swarning\sin\sMSVC.
+D 2022-04-21T19:20:38.804
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -624,7 +624,7 @@ F src/upsert.c 8789047a8f0a601ea42fa0256d1ba3190c13746b6ba940fe2d25643a7e991937
 F src/utf.c ee39565f0843775cc2c81135751ddd93eceb91a673ea2c57f61c76f288b041a0
 F src/util.c 602fe229f32a96ceccae4f40824129669582096f7c355f53dbac156c9fecef23
 F src/vacuum.c 6c38ddc52f0619865c91dae9c441d4d48bf3040d7dc1bc5b22da1e45547ed0b3
-F src/vdbe.c e82071ff183d3cf9aa3afeefc40f10a2443e8056e16c38f6d80e041da7ec3fb2
+F src/vdbe.c a4d710ef5a5a5be60cbb0ae74bba569d2689b670a73e825276687d89559ab917
 F src/vdbe.h 89f5edb1422c8783a0b29db836e409876f2b3e847f78e2b21b1fbcc48a93f85f
 F src/vdbeInt.h 5f3d0abcf30c2b7a6672ad4386f18be0fca9c9b2cefe18f85a2e3df74f2613bf
 F src/vdbeapi.c 354c893f1500cf524cc45c32879b9c68893a28b77e3442c24668d6afe4236217
@@ -1945,8 +1945,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 77aed89192bdbad819ac17bf5d08728278a9b8cbbbef1d805df230caff79b417
-R 9aaafc06672426af81fcdc005d19ebe8
+P dfd2100bc4f316825fd199b347849d1a2b941837f9eedcf36f3c3d280692b991
+R b0caf88c4ea0c8c655e6322050b10cd7
 U drh
-Z 3b2a5cb05d697a79a788f6022f5820da
+Z 411498f228eb3c02198e993caa11ad7e
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-dfd2100bc4f316825fd199b347849d1a2b941837f9eedcf36f3c3d280692b991
+b870d2a2fa54ddab6ffc9b9d95f52420a5a6831aeb73dac75355ca1ab15a190e

src/vdbe.c

@@ -5012,6 +5012,9 @@ case OP_Found: {        /* jump, in3 */
     /* Composite key generated by OP_MakeRecord */
     assert( pIn3->flags & MEM_Blob );
     assert( pOp->opcode!=OP_NoConflict );
+#if defined(_MSC_VER)
+    memset(&r, 0, sizeof(r));  /* Silence a harmless compiler warning */
+#endif
     rc = ExpandBlob(pIn3);
     assert( rc==SQLITE_OK || rc==SQLITE_NOMEM );
     if( rc ) goto no_mem;