Windows build failure in dbUnitTest.c

[Andrew Johnson]

Reminder (a real bug in both 3.15 and 3.16 reported by the Jenkins Windows build agents):

make[3]: Entering directory src/ioc/O.win32-x86
cl -DUSE_TYPED_RSET -nologo -D__STDC__=0 -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE -Ox -GL -Oy- -W3 -MD -DEPICS_BUILD_DLL -DEPICS_CALL_DLL -I. -I../O.Common -I. -I. -I.. -I../../../src/ioc/as -I../../../src/ioc/bpt -I../../../src/ioc/db -I../../../src/ioc/dbStatic -I../../../src/ioc/dbtemplate -I../../../src/ioc/misc -I../../../src/ioc/registry -I../../../src/ioc/rsrv -I../../../include/compiler/msvc -I../../../include/os/WIN32 -I../../../include -c ../../../src/ioc/db/dbUnitTest.c
dbUnitTest.c
../../../src/ioc/db/dbUnitTest.c(133) : warning C4244: '=' : conversion from 'double' to 'epicsFloat32', possible loss of data
../../../src/ioc/db/dbUnitTest.c(250) : warning C4018: '<' : signed/unsigned mismatch
../../../src/ioc/db/dbUnitTest.c(255) : error C2036: 'void *' : unknown size
../../../src/ioc/db/dbUnitTest.c(255) : error C2036: 'const void *' : unknown size
../../../configure/RULES_BUILD:229: recipe for target 'dbUnitTest.obj' failed
make[3]: *** [dbUnitTest.obj] Error 2
make[3]: Leaving directory src/ioc/O.win32-x86