Bug#847757: testdisk FTBFS on mips: common.h:128:2: error: initializer element is not constant

[Daniel Knezevic]

I tried Christophe's patch. It does not fix the build.
Package still FTBFS with "initializer element is not constant" error.

Currently gcc-6 is used as default compiler, by changing the compiler to gcc-5
testdisk builds successfully.