Rename inteval attribute in mjLROpt to interval.

PiperOrigin-RevId: 509275105
Change-Id: I0ffb9cf485a504843ed255f0b4f24e9285a1c273

src/engine/engine_io.c

@@ -50,7 +50,7 @@ void mj_defaultLROpt(mjLROpt* opt) {
   opt->timeconst      = 1;
   opt->timestep       = 0.01;
   opt->inttotal       = 10;
-  opt->inteval        = 2;
+  opt->interval       = 2;
   opt->tolrange       = 0.05;
 }
 

src/engine/engine_setconst.c

@@ -508,7 +508,7 @@ int mj_setLengthRange(mjModel* m, mjData* d, int index,
       }
 
       // update limits
-      if (d->time > opt->inttotal-opt->inteval) {
+      if (d->time > opt->inttotal-opt->interval) {
         if (len<lmin[side] || !updated) {
           lmin[side] = len;
         }