Bug#814130: mpqc3: FTBFS (32-bit): sc::MessageGrp::sum cannot be overloaded

[Aaron M. Ucko]

Source: mpqc3
Version: 0.0~git20150911-1
Severity: important
Justification: fails to build from source

Builds of mpqc3 for 32-bit platforms such as i386 have been failing:

  /«PKGBUILDDIR»/src/lib/util/group/message.h:502:18: error: 'virtual void 
sc::MessageGrp::sum(size_t*, int, size_t*, int)' cannot be overloaded
       virtual void sum(size_t* data, int n, size_t* = 0, int target = -1);
                    ^
  /«PKGBUILDDIR»/src/lib/util/group/message.h:499:18: error: with 'virtual void 
sc::MessageGrp::sum(unsigned int*, int, unsigned int*, int)'
       virtual void sum(unsigned int* data, int n, unsigned int* = 0, int 
target = -1);
                    ^

Could you please take a look, and conditionalize one of these variants
appropriately?

Thanks!