experiment: cppcheck cleanup

[experiments/drive.cpp:83] -> [experiments/drive.cpp:96]: (style)
Variable 'check' is reassigned a value before the old one has been used.

Change-Id: I241a2b38418ab89790d2d8762aaceb3cd080ad77
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/experiments/drive.cpp b/experiments/drive.cpp
index 3eed0a0..22fd4b6 100644
--- a/experiments/drive.cpp
+++ b/experiments/drive.cpp
@@ -80,7 +80,7 @@
 
     while (reading)
     {
-        bool check = false;
+        bool check;
         ReadReturn r0 = fan0->read();
         ReadReturn r1 = fan1->read();
         int64_t n0 = static_cast<int64_t>(r0.value);