msun: use previously ignored value.

This fixes evaluation of exceptional values in scalblnl().
While here, simplify the code as suggested by Bruce Evans.

Reported by:	clang static analyzer
MFC after:	1 week

1 files changed, 4 insertions, 22 deletions

diff --git a/lib/msun/src/s_scalbln.c b/lib/msun/src/s_scalbln.c
index d609d4e..2aa6900 100644
--- a/lib/msun/src/s_scalbln.c
+++ b/lib/msun/src/s_scalbln.c
@@ -35,13 +35,7 @@ scalbln (double x, long n)
 {
 	int in;
 
-	in = (int)n;
-	if (in != n) {
-		if (n > 0)
-			in = INT_MAX;
-		else
-			in = INT_MIN;
-	}
+	in = (n > INT_MAX) ? INT_MAX : (n < INT_MIN) ? INT_MIN : n;
 	return (scalbn(x, in));
 }
 
@@ -50,13 +44,7 @@ scalblnf (float x, long n)
 {
 	int in;
 
-	in = (int)n;
-	if (in != n) {
-		if (n > 0)
-			in = INT_MAX;
-		else
-			in = INT_MIN;
-	}
+	in = (n > INT_MAX) ? INT_MAX : (n < INT_MIN) ? INT_MIN : n;
 	return (scalbnf(x, in));
 }
 
@@ -65,12 +53,6 @@ scalblnl (long double x, long n)
 {
 	int in;
 
-	in = (int)n;
-	if (in != n) {
-		if (n > 0)
-			in = INT_MAX;
-		else
-			in = INT_MIN;
-	}
-	return (scalbnl(x, (int)n));
+	in = (n > INT_MAX) ? INT_MAX : (n < INT_MIN) ? INT_MIN : n; 
+	return (scalbnl(x, in));
 }