Yes, this fix is easier.

lexer/smarty_internal_templateparser.y

@@ -759,19 +759,6 @@ value(res)    ::= varindexed(vi) DOUBLECOLON static_class_access(r). {
     res = $prefixVar .'::'.r[0].r[1];
 }
 
-value(res)    ::= varindexed(vi) DOUBLECOLON static_class_constant(r). {
-    if ($this->security && $this->security->static_classes !== array()) {
-        $this->compiler->trigger_template_error('dynamic static class not allowed by security setting');
-    }
-    $prefixVar = $this->compiler->getNewPrefixVariable();
-    if (vi['var'] === '\'smarty\'') {
-        $this->compiler->appendPrefixCode("<?php {$prefixVar} = ". $this->compiler->compileTag('private_special_variable',array(),vi['smarty_internal_index']).';?>');
-     } else {
-        $this->compiler->appendPrefixCode("<?php  {$prefixVar} = ". $this->compiler->compileVariable(vi['var']).vi['smarty_internal_index'].';?>');
-    }
-    res = $prefixVar .'::'.r[0];
-}
-
                   // Smarty tag
 value(res)       ::= smartytag(st). {
     $prefixVar = $this->compiler->getNewPrefixVariable();
@@ -792,29 +779,17 @@ value(res)       ::= NAMESPACE(c). {
 value(res)       ::= arraydef(a). {
     res = a;
 }
-
-                  // static class constant access
-value(res)       ::= ns1(c)DOUBLECOLON static_class_constant(s). {
-    if (!in_array(strtolower(c), array('self', 'parent')) && (!$this->security || $this->security->isTrustedStaticClassAccess(c, s, $this->compiler))) {
-         if (isset($this->smarty->registered_classes[c])) {
-            res = $this->smarty->registered_classes[c].'::'.s[0];
-        } else {
-            res = c.'::'.s[0];
-        }
-    } else {
-        $this->compiler->trigger_template_error ('static class \''.c.'\' is undefined or not allowed by security setting');
-    }
-}
-
-                  // other static class access
+                  // static class access
 value(res)       ::= ns1(c)DOUBLECOLON static_class_access(s). {
     if (!in_array(strtolower(c), array('self', 'parent')) && (!$this->security || $this->security->isTrustedStaticClassAccess(c, s, $this->compiler))) {
         if (isset($this->smarty->registered_classes[c])) {
             res = $this->smarty->registered_classes[c].'::'.s[0].s[1];
         } else {
-            trigger_error('Using unregistered static method "' . c.'::'.s[0] . '" in a template is deprecated and will be ' .
-                    'removed in a future release. Use Smarty::registerClass to explicitly register ' .
-                    'a class for access.', E_USER_DEPRECATED);
+            if (s[2] === 'method') {
+                trigger_error('Using unregistered static method "' . c.'::'.s[0] . '" in a template is deprecated and will be ' .
+                        'removed in a future release. Use Smarty::registerClass to explicitly register ' .
+                        'a class for access.', E_USER_DEPRECATED);
+            }
             res = c.'::'.s[0].s[1];
         } 
     } else {
@@ -1138,11 +1113,6 @@ modparameter(res) ::= COLON array(mp). {
     res = array(mp);
 }
 
-                  // static class constant
-static_class_constant(res)       ::= ID(v). {
-    res = array(v);
-}
-
                   // static class methode call
 static_class_access(res)       ::= method(m). {
     res = array(m, '', 'method');
@@ -1153,6 +1123,11 @@ static_class_access(res)       ::= method(m) objectchain(oc). {
     res = array(m, oc, 'method');
 }
 
+                  // static class constant
+static_class_access(res)       ::= ID(v). {
+    res = array(v, '', 'constant');
+}
+
                   // static class variables
 static_class_access(res)       ::=  DOLLARID(v) arrayindex(a). {
     res = array(v, a, 'property');