Use strlen() on string like objects instead of count()

Signed-off-by: Michal Čihař <michal@cihar.com>

Author: nijel

src/Statements/LoadStatement.php

@@ -185,7 +185,7 @@ public function build()
 
         $ret .= ' INTO TABLE ' . $this->table;
 
-        if ($this->partition !== null && count($this->partition) > 0) {
+        if ($this->partition !== null && strlen($this->partition) > 0) {
             $ret .= ' PARTITION ' . ArrayObj::build($this->partition);
         }
 
@@ -197,7 +197,7 @@ public function build()
             $ret .= ' ' . $this->fields_keyword . ' ' . $this->fields_options;
         }
 
-        if ($this->lines_options !== null && count($this->lines_options) > 0) {
+        if ($this->lines_options !== null && strlen($this->lines_options) > 0) {
             $ret .= ' LINES ' . $this->lines_options;
         }