Another minor optimization to OP_Transaction.

FossilOrigin-Name: d80077aee3904e5d93164b342cae14d813de8e84e567462412751e06c7487d41

manifest

@@ -1,5 +1,5 @@
-C Change\ssqlite3BtreeBeginTrans()\sto\sreturn\sthe\sBTREE_SCHEMA_COOKIE,\sfor\sa\nsmall\sspeed\simprovement\swhen\sstarting\snew\stransactions.
-D 2018-06-06T16:28:40.777
+C Another\sminor\soptimization\sto\sOP_Transaction.
+D 2018-06-06T17:45:51.934
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F Makefile.in bfc40f350586923e0419d2ea4b559c37ec10ee4b6e210e08c14401f8e340f0da
@@ -565,7 +565,7 @@ F src/upsert.c 47edd408cc73f8d3c00a140550d1ad180b407c146285947969dd09874802bf88
 F src/utf.c 810fbfebe12359f10bc2a011520a6e10879ab2a163bcb26c74768eab82ea62a5
 F src/util.c d9eb0a6c4aae1b00a7369eadd7ca0bbe946cb4c953b6751aa20d357c2f482157
 F src/vacuum.c 36e7d21a20c0bf6ef4ef7c399d192b5239410b7c4d3c1070fba4e30810d0b855
-F src/vdbe.c 6d399cc8e10a7c1b2103e5bc21874cbbb645bab39ae5839a124547de9c67281d
+F src/vdbe.c ffa02701cda500e0770abf139d860447e546949c5d55acab58ad8239ad92daf0
 F src/vdbe.h e3f43bcc27ff30b0f25a6104d0cb5657e1c4b5e1b5cd2dd2216d5bcc2156a746
 F src/vdbeInt.h 42d3e65ea0c664f6d9bc9a53de645c0baf8566ff0188409ff3b8d2abc327bc17
 F src/vdbeapi.c 765a0bbe01311626417de6cb743f7f25f9f98435c98a9df4bb0714d11014633d
@@ -1730,7 +1730,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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 U drh
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