Add exact->inexact in plots for Guile 1.8 to print parsable doubles.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@16152 57a11ea4-9604-0410-9ed3-97b8803252fd

src/report/report-system/html-barchart.scm

@@ -266,7 +266,7 @@
 (define (gnc:html-barchart-render barchart doc)
   (define (ensure-numeric elt)
     (cond ((number? elt)
-           elt)
+           (exact->inexact elt))
           ((string? elt)
            (with-input-from-string elt
              (lambda ()

src/report/report-system/html-piechart.scm

@@ -136,7 +136,7 @@
     (map
      (lambda (elt)
        (cond ((number? elt)
-              (abs elt))
+              (exact->inexact (abs elt)))
              ((string? elt)
               (with-input-from-string elt
                 (lambda ()

src/report/report-system/html-scatter.scm

@@ -127,7 +127,7 @@
 (define (gnc:html-scatter-render scatter doc)
   (define (ensure-numeric elt)
     (cond ((number? elt)
-           elt)
+           (exact->inexact elt))
           ((string? elt)
            (with-input-from-string elt
              (lambda ()