In Aseba Studio, memory usage, variables_total_size displayed instead of bytecode_total_size

[ypiguet-epfl]

In Aseba Studio, when "Show memory usage" is enabled in menu View, the total memory amount available for bytecode displayed at the bottom of the window (what follows the slash) shows wrongly the total memory amount available for variables.

Fix suggestion: in file aseba/clients/studio/NodeTab.cpp in method NodeTab::updateMemoryUsage, in the expression for bytecodeText (not for variableText), replace .arg(res.variables_total_size()) with .arg(res.bytecode_total_size())