fix: if passed a string filled with nothing but symbol characters, would result in "Invalid argument supplied for foreach()" errors in two places

git-svn-id: http://svn.php.net/repository/pear/packages/Text_LanguageDetect/trunk@208964 c90b9560-bf6c-de11-be94-00142212c4b1

Author: Nicholas Pisarro

Text/LanguageDetect/Parser.php

@@ -231,6 +231,7 @@ function analyze()
             }
 
             $skipped_count = 0;
+            $unicode_chars = array();
         }
 
         // trigram startup
@@ -343,7 +344,11 @@ function analyze()
                 }
             }
 
-            $this->_trigram_ranks = $this->_arr_rank($this->_trigram);
+            if (!empty($this->_trigram)) {
+                $this->_trigram_ranks = $this->_arr_rank($this->_trigram);
+            } else {
+                $this->_trigram_ranks = array();
+            }
         }
     }
 }