tools/dev/functions_undocumented.sh: update location of texi files

tools/dev/functions_undocumented.sh

@@ -7,7 +7,7 @@ functions=$(grep 'starpu.*(.*);' include/*.h | awk -F':' '{print $2}' | sed 's/(
 
 for func in $functions ; do
     #echo Processing function $func
-    x=$(grep $func doc/starpu.texi | grep deftypefun)
+    x=$(grep $func doc/starpu.texi doc/chapters/*texi | grep deftypefun)
     if test "$x" == "" ; then
         echo "Error. Function ${redcolor}${func}${stcolor} is not (or incorrectly) documented"
     fi