Snippets for libnova 0.15.0 from Alpine riscv64

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-riscv64/community/libnova/libnova-0.15.0-r0.log.

• dynamical_time.c:124:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    124 |     if (i > (TERMS - 2))
        |     ^~
  

• elliptic_motion.c:310:20: warning: variable 'H' set but not used [-Wunused-but-set-variable]
    310 |         double A,G,H;
        |                    ^
  

• rise_set.c:527:21: warning: variable 'dmr' set but not used [-Wunused-but-set-variable]
    527 |         double dmt, dmr, dms;
        |                     ^~~
  

• utility.c:238:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    238 |     if (angle >= 0.0 && angle < 360.0)
        |     ^~
  

• utility.c:253:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    253 |     if (angle >= 0.0 && angle < (2.0 * M_PI))
        |     ^~
  

• utility.c:270:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    270 |     if (angle > (-2.0 * M_PI) && angle < (2.0 * M_PI))
        |     ^~
  

• neptune.c:2186:31: warning: variable 't5' set but not used [-Wunused-but-set-variable]
   2186 |         double t, t2, t3, t4, t5;
        |                               ^~
  

• uranus.c:5435:31: warning: variable 't5' set but not used [-Wunused-but-set-variable]
   5435 |         double t, t2, t3, t4, t5;
        |                               ^~
  

• lunar.c:190:21: warning: 'peri' defined but not used [-Wunused-const-variable=]
    190 | static const double peri[5] =
        |                     ^~~~
  

• lunar.c:181:21: warning: 'earth' defined but not used [-Wunused-const-variable=]
    181 | static const double earth[5] =
        |                     ^~~~~
  

• lunar.c:172:21: warning: 'W3' defined but not used [-Wunused-const-variable=]
    172 | static const double W3[5] =
        |                     ^~
  

• lunar.c:163:21: warning: 'W2' defined but not used [-Wunused-const-variable=]
    163 | static const double W2[5] =
        |                     ^~
  

• test.c:227:16: warning: variable 'JDE' set but not used [-Wunused-but-set-variable]
    227 |         double JDE, JD;
        |                ^~~