XQuartz: Unset CFProcessPath... blech

(cherry picked from commit ce4fbfbc75)

hw/xquartz/quartzStartup.c

@@ -98,6 +98,12 @@ int main(int argc, char **argv, char **envp) {
     int         i;
     int         fd[2];
 
+    /* Unset CFProcessPath, so our children don't inherit this kludge we need
+     * to load our nib.  If an xterm gets this set, then it fails to
+     * 'open hi.txt' properly.
+     */
+    unsetenv("CFProcessPath");
+    
     // Make a pipe to pass events
     assert( pipe(fd) == 0 );
     darwinEventReadFD = fd[0];