rename totalTicksOff to totalTimeDrift

src/engine/engine.cpp

@@ -1707,7 +1707,7 @@ void DivEngine::playSub(bool preserveDrift, int goalRow) {
     subticks=0;
     tempoAccum=0;
     totalTime=TimeMicros(0,0);
-    totalTicksOff=0;
+    totalTimeDrift=0;
     totalTicksR=0;
     curMidiClock=0;
     curMidiTime=0;
@@ -3980,7 +3980,7 @@ void DivEngine::quitDispatch() {
   changeOrd=-1;
   changePos=0;
   totalTime=TimeMicros(0,0);
-  totalTicksOff=0;
+  totalTimeDrift=0;
   totalTicksR=0;
   curMidiClock=0;
   curMidiTime=0;

src/engine/engine.h

@@ -512,7 +512,7 @@ class DivEngine {
   int stepPlay;
   int changeOrd, changePos, totalTicksR, curMidiClock, curMidiTime, totalCmds, lastCmds, cmdsPerSecond;
   TimeMicros totalTime;
-  double totalTicksOff;
+  double totalTimeDrift;
   int curMidiTimePiece, curMidiTimeCode;
   unsigned char extValue, pendingMetroTick;
   DivGroovePattern speeds;
@@ -1530,7 +1530,7 @@ class DivEngine {
       totalCmds(0),
       lastCmds(0),
       cmdsPerSecond(0),
-      totalTicksOff(0.0),
+      totalTimeDrift(0.0),
       curMidiTimePiece(0),
       curMidiTimeCode(0),
       extValue(0),

src/engine/playback.cpp

@@ -2583,9 +2583,9 @@ bool DivEngine::nextTick(bool noAccum, bool inhibitLowLat) {
         double dt=divider*tickMult;
         totalTicksR++;
         totalTime.micros+=1000000/dt;
-        totalTicksOff+=fmod(1000000.0,dt);
-        while (totalTicksOff>=dt) {
-          totalTicksOff-=dt;
+        totalTimeDrift+=fmod(1000000.0,dt);
+        while (totalTimeDrift>=dt) {
+          totalTimeDrift-=dt;
           totalTime.micros++;
         }
       }