Compile error on vxWorks

When I try to build the master branch (or 2-4-10) on vxWorks 6.9.4.1 I get the following error:

```
make[3]: Entering directory `/home/epics/devel/pmac-2-5-13/pmacApp/pmacAsynVMEPortSrc/O.vxWorks-ppc32'
/usr/local/vw/vxWorks-6.9.4/gnu/4.3.3-vxworks-6.9/x86-linux2/bin/ccppc -DCPU=PPC32 -DvxWorks=vxWorks -include /usr/local/vw/vxWorks-6.9.4/vxworks-6.9/target/h/vxWorks.h -O2 -Wall -Werror-implicit-function-declaration -DSTATUS_RECORD -mstrict-align -mlongcall -fno-builtin -I. -I../O.Common -I. -I. -I.. -I../../../include/compiler/gcc -I../../../include/os/vxWorks -I../../../include -I/corvette/usr/local/epics-devel/base-7.0.5/include/compiler/gcc -I/corvette/usr/local/epics-devel/base-7.0.5/include/os/vxWorks -I/corvette/usr/local/epics-devel/base-7.0.5/include -I/corvette/home/epics/devel/asyn-4-42/include -I/corvette/home/epics/devel/calc-3-7-3/include -I/corvette/home/epics/devel/motor-7-0/include -I/corvette/home/epics/devel/busy-1-7-2/include -I/usr/local/vw/vxWorks-6.9.4/vxworks-6.9/target/h -I/usr/local/vw/vxWorks-6.9.4/vxworks-6.9/target/h/wrn/coreip -c ../devPmacRam.c
In file included from /corvette/usr/local/epics-devel/base-7.0.5/include/dbAccess.h:20,
from ../devPmacRam.c:89:
/corvette/usr/local/epics-devel/base-7.0.5/include/dbBase.h:164: warning: 'rset' is deprecated
In file included from /corvette/usr/local/epics-devel/base-7.0.5/include/dbAccess.h:24,
from ../devPmacRam.c:89:
/corvette/usr/local/epics-devel/base-7.0.5/include/dbAccessDefs.h:211: warning: 'rset' is deprecated
../devPmacRam.c: In function 'devPmacRamEvent_read':
../devPmacRam.c:1075: error: incompatible types in assignment
make[3]: *** [devPmacRam.o] Error 1
make[3]: Leaving directory `/home/epics/devel/pmac-2-5-13/pmacApp/pmacAsynVMEPortSrc/O.vxWorks-ppc32'
```