Fix a couple static analysis catches

Fixes #643

Firmware/Drivers/DRV8301/drv8301.hpp

@@ -11,7 +11,7 @@
 
 class Drv8301 : public GateDriverBase, public OpAmpBase {
 public:
-    typedef enum {
+    typedef enum : uint32_t {
         FaultType_NoFault  = (0 << 0),  //!< No fault
 
         // Status Register 1

Firmware/MotorControl/acim_estimator.hpp

@@ -22,7 +22,7 @@ public:
     InputPort<float2D> idq_src_;
 
     // State variables
-    float active_ = false;
+    bool active_ = false;
     uint32_t last_timestamp_ = 0;
     float rotor_flux_ = 0.0f; // [A]
     float phase_offset_ = 0.0f; // [A]