Update FindZLIB.cmake to version 2.6.1 + add MSYS path.

#

# From CMake 2.6.1 + some path changes

#

# - Find zlib

# Find the native ZLIB includes and library

#

  SET(ZLIB_FIND_QUIETLY TRUE)

ENDIF (ZLIB_INCLUDE_DIR)

FIND_PATH(ZLIB_INCLUDE_DIR zlib.h

  /usr/local/include

  /usr/include

  ${ZLIB_DIR_SEARCH}/local/include

)

FIND_PATH(ZLIB_INCLUDE_DIR zlib.h PATHS ${ZLIB_DIR_SEARCH}/local/include)

SET(ZLIB_NAMES z zlib zdll)

FIND_LIBRARY(ZLIB_LIBRARY

  NAMES ${ZLIB_NAMES}

  PATHS /usr/lib /usr/local/lib ${ZLIB_DIR_SEARCH}/local/lib

)

FIND_LIBRARY(ZLIB_LIBRARY NAMES ${ZLIB_NAMES} PATHS ${ZLIB_DIR_SEARCH}/local/lib)

IF (ZLIB_INCLUDE_DIR AND ZLIB_LIBRARY)

   SET(ZLIB_FOUND TRUE)

    SET( ZLIB_LIBRARIES ${ZLIB_LIBRARY} )

ELSE (ZLIB_INCLUDE_DIR AND ZLIB_LIBRARY)

   SET(ZLIB_FOUND FALSE)

   SET( ZLIB_LIBRARIES )

ENDIF (ZLIB_INCLUDE_DIR AND ZLIB_LIBRARY)

# handle the QUIETLY and REQUIRED arguments and set ZLIB_FOUND to TRUE if 

# all listed variables are TRUE

INCLUDE(FindPackageHandleStandardArgs)

FIND_PACKAGE_HANDLE_STANDARD_ARGS(ZLIB DEFAULT_MSG ZLIB_LIBRARY ZLIB_INCLUDE_DIR)

IF(ZLIB_FOUND)

   IF (NOT ZLIB_FIND_QUIETLY)

      MESSAGE(STATUS "Found ZLIB: ${ZLIB_LIBRARY}")

   ENDIF (NOT ZLIB_FIND_QUIETLY)

  SET( ZLIB_LIBRARIES ${ZLIB_LIBRARY} )

ELSE(ZLIB_FOUND)

   IF (ZLIB_FIND_REQUIRED)

      MESSAGE(STATUS "Looked for Z libraries named ${ZLIBS_NAMES}.")

      MESSAGE(FATAL_ERROR "Could NOT find z library")

   ENDIF (ZLIB_FIND_REQUIRED)

  SET( ZLIB_LIBRARIES )

ENDIF(ZLIB_FOUND)

MARK_AS_ADVANCED(

  ZLIB_LIBRARY

  ZLIB_INCLUDE_DIR

  )

MARK_AS_ADVANCED( ZLIB_LIBRARY ZLIB_INCLUDE_DIR )