ssgInit() normally checks for a valid GL context and aborts if one wasn't

found.  However, due to bugs in some versions of Mesa, it sometimes fails
even when a context exists.  Temporarily disable the context checks until
we get a working version of Mesa.

x11-toolkits/plib/files/patch-src::ssg::ssg.cxx

@@ -0,0 +1,31 @@
+--- src/ssg/ssg.cxx.orig	Mon Mar  3 11:25:56 2003
++++ src/ssg/ssg.cxx	Mon Mar  3 11:27:40 2003
+@@ -35,6 +35,7 @@
+ #  endif
+ #endif
+ 
++#if 0
+ static bool glIsValidContext ( void )
+ {
+ #if defined(CONSOLE)
+@@ -49,6 +50,7 @@
+   return ( glXGetCurrentContext () != NULL ) ;
+ #endif
+ }
++#endif
+ 
+ sgMat4 _ssgOpenGLAxisSwapMatrix =
+ {
+@@ -105,10 +107,12 @@
+ 
+ void ssgInit ()
+ {
++#if 0
+   if ( ! glIsValidContext () )
+   {
+     ulSetError ( UL_FATAL, "ssgInit called without a valid OpenGL context.");
+   }
++#endif
+ 
+   ssgTexturePath ( "." ) ;
+   ssgModelPath   ( "." ) ;