[patch] scalb.3: fix prototypes for scalbf and scalbl

[Mark H Weaver <mhw-StlzRsPvAncdnm+yROfE0A@public.gmane.org>]

The prototypes for scalbf and scalbl given in scalb.3 are incorrect.
If you have doubts, try compiling the following code:

  #include <math.h>
  double scalb(double x, double exp);
  float scalbf(float x, double exp);
  long double scalbl(long double x, double exp);

To gain confidence that the prototypes below are correct, compile the
following:

  #include <math.h>
  double scalb(double x, double exp);
  float scalbf(float x, float exp);
  long double scalbl(long double x, long double exp);

Or search for man pages from other sources, e.g.:

  http://www.unix.com/man-page/OpenSolaris/3m/scalbf/
  http://docs.oracle.com/cd/E26505_01/html/816-5172/scalb-3m.html

The patch below fixes these mistakes.

     Thanks,
       Mark


diff --git a/man3/scalb.3 b/man3/scalb.3
index 990c0bf..a5b2e5b 100644
--- a/man3/scalb.3
+++ b/man3/scalb.3
@@ -33,9 +33,9 @@ by integral power of radix (OBSOLETE)
 .sp
 .BI "double scalb(double " x ", double " exp );
 .br
-.BI "float scalbf(float " x ", double " exp );
+.BI "float scalbf(float " x ", float " exp );
 .br
-.BI "long double scalbl(long double " x ", double " exp );
+.BI "long double scalbl(long double " x ", long double " exp );
 .sp
 Link with \fI\-lm\fP.
 .sp
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