Reword fall through comments to appease gcc -Wimplicit-fallthrough

Gets rid of these warnings:
math.c:707:24: warning: this statement may fall through [-Wimplicit-fallthrough=]
   case kSQR:   flagINV = !flagINV; /* fall through to */
                ~~~~~~~~^~~~~~~~~~
math.c:708:3: note: here
   case kSQRT:  if (flagINV) dnum=dnum*dnum;
   ^~~~
math.c:711:24: warning: this statement may fall through [-Wimplicit-fallthrough=]
   case k10X:   flagINV = !flagINV; /* fall through to */
                ~~~~~~~~^~~~~~~~~~
math.c:712:3: note: here
   case kLOG:   if (flagINV) dnum=pow(10.0,dnum);
   ^~~~
math.c:715:24: warning: this statement may fall through [-Wimplicit-fallthrough=]
   case kEXP:   flagINV = !flagINV; /* fall through to */
                ~~~~~~~~^~~~~~~~~~
math.c:716:3: note: here
   case kLN:    if (flagINV) dnum=exp(dnum);
   ^~~~

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/math.c b/math.c
index 436bff2..bd016fd 100644
--- a/math.c
+++ b/math.c
@@ -704,15 +704,15 @@ oneop(int keynum)
   case kE:     if (rpn && memop != kENTR) PushNum(dnum); dnum=M_E;  break;
   case kPI:    if (rpn && memop != kENTR) PushNum(dnum); dnum=M_PI;  break;
   case kRECIP: dnum=1.0/dnum;  break;
-  case kSQR:   flagINV = !flagINV; /* fall through to */
+  case kSQR:   flagINV = !flagINV; /* fall through */
   case kSQRT:  if (flagINV) dnum=dnum*dnum;
 	       else dnum=sqrt(dnum);
 	       break;
-  case k10X:   flagINV = !flagINV; /* fall through to */
+  case k10X:   flagINV = !flagINV; /* fall through */
   case kLOG:   if (flagINV) dnum=pow(10.0,dnum);
   	       else dnum=log10(dnum);
 	       break;
-  case kEXP:   flagINV = !flagINV; /* fall through to */
+  case kEXP:   flagINV = !flagINV; /* fall through */
   case kLN:    if (flagINV) dnum=exp(dnum);
 	       else dnum=log(dnum);
 	       break;