Committing in .

 Committing in .

 Modified Files:
 	Mesa/src/context.c

 Initializing ctx->Driver.CurrentExecPrimitive to 0, just after the allocation
 of the context. I hope this solved a very rare crash of the molecule mode
 of xlockmore on my VMS-machine. (I have not seen any crash the last week.
 Normally it crashed at least once in the 3 days)

----------------------------------------------------------------------