fix gcc 3.8 warning about uninitialize variable
fix gcc 3.8 warning about uninitialize variable

The variable is never used uninitilized, but gcc-3.8 is not
able to see that (gcc-3.9 does see it). Fix by explicitly
initializing it.

metratec/mand,metratec/mand,opencpe/mand,opencpe/mand,opencpe/mand,opencpe/mand,metratec/mand