lcms: passing null array causes crash in ICC_ProfileRGB

Null is not checked causing a crash in loadProfile and setTagData.

Run javasoft.sqe.tests.api.java.awt.Color.ICC_ProfileRGB Tests without passing a profile.

jgodinez@narra:~$ /java/re/openjdk/6/latest/openjdk/binaries/solaris-sparc/latest/bin/java -cp /java/re/jck/6.0/promoted/beta2/b20/binaries/JCK-runtime-60/classes javasoft.sqe.tests.api.java.awt.Color.ICC_ProfileRGB.SetDataTest
#
# An unexpected error has been detected by Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0xfeca12a8, pid=14742, tid=2
#
# Java VM: OpenJDK Server VM (11.0-b17 mixed mode solaris-sparc)
# Problematic frame:
# V [libjvm.so+0x4a12a8]
#
# An error report file with more information is saved as:
# /home/jgodinez/hs_err_pid14742.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#
Abort (core dumped)