Integer conversion warning on HP-UX about cmockery HOT 2 OPEN

I think it's clearer to use SIZE_MAX. Since this is a recent addition to std C, 
we need to provide it if it isn't 
already defined. So, put this after the #includes:

#ifndef SIZE_MAX
#define SIZE_MAX ((size_t)-1)
#endif

then the patch becomes:

-       total_failed = -1;
+       total_failed = SIZE_MAX;

Please feel free to commit this fix to the staging.