Protect plot count against math domain error

uhepp_org/uhepp_vault/templates/uhepp_vault/home.html

@@ -5,7 +5,13 @@
 <div class="jumbotron jumbo-fluid plot-background shadow">
 <div class="container">
   <h1 class="display-4">uhepp hub</h1>
-  <h2>Home of over {{ plot_count }} plots</h2>
+  <h2>
+  {% if plot_count < 10 %}
+  Home of plots
+  {% else %}
+  Home of over {{ plot_count }} plots
+  {% endif %}
+  </h2>
 </div>
 </div>
 {% endblock %}

uhepp_org/uhepp_vault/views.py

@@ -22,6 +22,9 @@ from .models import PUBLIC_LEVEL, INTERNAL_LEVEL, PUBLIC_LEVEL, \
 from .forms import TokenForm
 
 def quantize(value, sig_digits):
+    if value <= 100:
+        return value
+
     magnitude = math.floor(math.log10(value))
     scale = magnitude - sig_digits + 1
     return math.floor(value / 10**scale) * 10**scale