Solaris strcasecmp - build failure (Bug #892)

build fails on Solaris 11 express with the below error.
The attached patch fixes it for me, but it may be not good enough for Solaris 11 where the function is AFAIK indeed not present.

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[ 75%] Building CXX object modules/legacy/CMakeFiles/opencv_legacy.dir/src/levmartrif.o
cd /export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy && /opt/sunstudio12.1/bin/CC -Dopencv_legacy_EXPORTS -DHAVE_CONFIG_H -DCVAPI_EXPORTS -D_REENTRANT -DNDEBUG -D+EXTENSIONS+ -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_POSIX_PTHREAD_SEMANTICS -DSOLARIS -DSOLARIS10 -DNO_DEBUG -D_UNICODE -DUNICODE -D_RWSTD_REENTRANT -D_XOPEN_SOURCE=500 -D_XPG5 -I/usr/include/stdcxx4/ansi -I/usr/include/stdcxx4 -I/opt/kde4/include -I/usr/include/stdcxx4/ansi -I/usr/include/stdcxx4 -library=no%Cstd -library=Crun -features=anachronisms,except,rtti,export,extensions,nestedaccess,tmplife,tmplrefstatic -instances=global -template=geninlinefuncs -s -xdebugformat=dwarf -xlang=c99 -xalias_level=compatible -xustr=ascii_utf16_ushort -Qoption ccfe -features=gcc -Qoption ccfe -features=zla -Qoption ccfe ++boolflag:sunwcch=false -mt -xF=%none -xbuiltin=%all -xinline=%auto -xprefetch=auto -xprefetch_auto_type=indirect_array_access -xprefetch_level=3 -xalias_level=compatible -KPIC -DPIC -xipo=0 -xO3 -xregs=no%frameptr -xjobs=2 -xrestrict=%all -xthreadvar=%all -z combreloc -z redlocsym -z nodefaultlib -z ignore -z now -z rescan -z absexec -xldscope=symbolic -xlibmil -s -xtarget=pentium4 -m32 -xarch=sse2 -xchip=pentium4 -xcache=8/64/4:256/128/8 -lc -lm -ldl -lpthread -lposix4 -lrt -mt -Y P,/opt/kde4/lib -i -L/opt/kde4/lib -R/opt/kde4/lib -L/usr/lib -R/usr/lib -Bdynamic -lstdcxx4 -lCrun -lc -lm -m32 -s -Y P,/opt/kde4/lib -i -L/opt/kde4/lib -R/opt/kde4/lib -L/usr/lib -R/usr/lib -Bdynamic -lstdcxx4 -lCrun -lc -lm -xtarget=pentium4 -m32 -xarch=sse2 -xchip=pentium4 -xcache=8/64/4:256/128/8 -xipo=0 -xO3 -xO3 -DNDEBUG -KPIC -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/. -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0 -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/include -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/include/opencv -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/include -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/src -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/../core/include -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/../imgproc/include -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/../calib3d/include -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/../features2d/include -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/../highgui/include -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/../video/include -I/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/../flann/include -o CMakeFiles/opencv_legacy.dir/src/levmartrif.o -c /export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/src/levmartrif.cpp
"/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/../flann/include/opencv2/flann/allocator.h", line 94: Warning: blocksize hides cvflann::PooledAllocator::blocksize.
"/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/../flann/include/opencv2/flann/allocator.h", line 124: Warning: blocksize hides cvflann::PooledAllocator::blocksize.
"/export/home/test/packages/BUILD/OpenCV-2.2.0/i386/OpenCV-2.2.0/modules/legacy/include/opencv2/legacy/blobtrack.hpp", line 63: Error: #error Do not know how to make case-insensitive string comparison on this platform.