Using a negative number in repeat loop hangs the project

[adazem009]

The repeat loop uses size_t, which is unsigned long, to store the loop count. If a negative number is used, it stores a very high number in the variable since it's unsigned. Changing the type to e. g. long should be enough to fix this.

libscratchcpp/src/engine/virtualmachine_p.cpp

Line 209 in 08201fd

size_t loopCount;