Minor correction to the batch tool changes in the previous check-in.

FossilOrigin-Name: 7c89d75de1e8d44d7ebd8eac1320b50dd6c221a8

manifest

@@ -1,5 +1,5 @@
-C Match\sthe\sMSVC\sbatch\sbuild\stool\ssub-routine\s'fn_UnsetVariable'\sa\sbit\smore\srobust.
-D 2016-01-27T23:50:14.931
+C Minor\scorrection\sto\sthe\sbatch\stool\schanges\sin\sthe\sprevious\scheck-in.
+D 2016-01-28T00:04:32.165
 F Makefile.in 027c1603f255390c43a426671055a31c0a65fdb4
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 72b7858f02017611c3ac1ddc965251017fed0845
@@ -1363,7 +1363,7 @@ F test/zerodamage.test cf6748bad89553cc1632be51a6f54e487e4039ac
 F tool/GetFile.cs a15e08acb5dd7539b75ba23501581d7c2b462cb5
 F tool/GetTclKit.bat 629d87562e0487c386db630033931d12d62e6372
 F tool/addopcodes.tcl 4ca9c3ef196f08da30add5d07ce0c9458dc8c633
-F tool/build-all-msvc.bat 6def0b5cebba36db69da8a92a9a31daf92714b4f x
+F tool/build-all-msvc.bat 77f85f4268c2711d637c629610d0cf3df5338638 x
 F tool/build-shell.sh 950f47c6174f1eea171319438b93ba67ff5bf367
 F tool/cg_anno.tcl 692ce4b8693d59e3a3de77ca97f4139ecfa641b0 x
 F tool/checkSpacing.c 810e51703529a204fc4e1eb060e9ab663e3c06d2
@@ -1422,7 +1422,7 @@ F tool/vdbe_profile.tcl 246d0da094856d72d2c12efec03250d71639d19f
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 4bf89891fbb076364dc45a6bf3246efa6bc33d5d
-R 9e8aa43303c9d43f019b8eceec782e78
+P 1edd5f31b9e6f91bb5434055a539428c000f1084
+R dd88757d0a47522dcabe5cdbe4d1c234
 U mistachkin
-Z 8662626dcb0cb6b59115e089abf15292
+Z b852cd61a6ae9681850058c67e7066b1

manifest.uuid

@@ -1 +1 @@
-1edd5f31b9e6f91bb5434055a539428c000f1084
+7c89d75de1e8d44d7ebd8eac1320b50dd6c221a8

tool/build-all-msvc.bat

@@ -732,6 +732,7 @@ GOTO no_errors
   SET VALUE=%1
   IF DEFINED VALUE (
     SET %VALUE%=
+    SET VALUE=
     CALL :fn_ResetErrorLevel
   )
   GOTO :EOF