RFR(XS): 7196866: CTW fails on Solaris

[Morris Meyer]

Folks,

Could I get a review for these two small changes in src/solaris/native.  
This is to fix the nightly CTW testing crashes on Solaris caused by a 
library SEGV internal to X11 that occurs during class initialization 
when the display is NULL.

I've tested this patch on SfBay with JPRT and with the CTW tests on 
Solaris x86 and Sparc.

Thanks much,

         --morris

JBS - https://jbs.oracle.com/bugs/browse/JDK-7196866
WEBREV - http://cr.openjdk.java.net/~morris/7196866