CPU/Dynarmic: Fixed a warning when incrementing the number of ticks in ExecuteInstructions.

src/core/arm/dynarmic/arm_dynarmic.cpp

@@ -136,7 +136,7 @@ MICROPROFILE_DEFINE(ARM_Jit, "ARM JIT", "ARM JIT", MP_RGB(255, 64, 64));
 void ARM_Dynarmic::ExecuteInstructions(int num_instructions) {
     MICROPROFILE_SCOPE(ARM_Jit);
 
-    unsigned ticks_executed = jit->Run(static_cast<unsigned>(num_instructions));
+    std::size_t ticks_executed = jit->Run(static_cast<unsigned>(num_instructions));
 
     AddTicks(ticks_executed);
 }