Update energymon dependencies.

Ensure the energymon is enabled before trying to get refresh interval.

components/profile_traits/Cargo.toml

@@ -19,7 +19,7 @@ features = [ "serde_serialization" ]
 
 [dependencies.energymon]
 git = "https://github.com/energymon/energymon-rust.git"
-rev = "67f74732ac"
+rev = "eba1d8a"
 optional = true
 
 [dependencies.energy-monitor]

components/profile_traits/energy.rs

@@ -36,8 +36,8 @@ mod energymon {
 
     static mut EM: Option<*mut EnergyMon> = None;
 
-    /// Read energy from the energy monitor, otherwise return 0.
-    pub fn read_energy_uj() -> u64 {
+    fn init() {
+        // can't use lazy_static macro for EM (no Sync trait for EnergyMon)
         static ONCE: Once = ONCE_INIT;
         ONCE.call_once(|| {
             if let Ok(em) = EnergyMon::new() {
@@ -47,14 +47,19 @@ mod energymon {
                 }
             }
         });
+    }
 
+    /// Read energy from the energy monitor, otherwise return 0.
+    pub fn read_energy_uj() -> u64 {
+        init();
         unsafe {
             // EnergyMon implementations of EnergyMonitor always return a value
             EM.map_or(0, |em| (*em).read_uj().unwrap())
         }
     }
 
     pub fn get_min_interval_ms() -> u32 {
+        init();
         unsafe {
             EM.map_or(0, |em| ((*em).interval_us() as f64 / 1000.0).ceil() as u32)
         }