[c.math] Add rand to index of library names.

jwakely · jwakely · commit d7544f51553e · 2015-05-08T17:57:18.000+01:00
diff --git a/source/numerics.tex b/source/numerics.tex
@@ -9016,6 +9016,7 @@
 
 \pnum
 The
+\indexlibrary{\idxcode{rand}}%
 \tcode{rand}
 function has the semantics specified in the C standard, except that the implementation
 may specify that particular library functions may call
