cast framewidth/height as float to prevent string values for round methods.

Author: Bashev

lib/internal/Magento/Framework/Image/Adapter/AbstractAdapter.php

@@ -562,14 +562,14 @@ protected function _adaptResizeValues($frameWidth, $frameHeight)
             }
         }
 
+        $frameWidth = (float)$frameWidth;
+        $frameHeight = (float)$frameHeight;
+
         // define coordinates of image inside new frame
         $srcX = 0;
         $srcY = 0;
         list($dstWidth, $dstHeight) = $this->_checkAspectRatio($frameWidth, $frameHeight);
 
-        $frameWidth = (float)$frameWidth;
-        $frameHeight = (float)$frameHeight;
-
         // define position in center
         // TODO: add positions option
         $dstY = round(($frameHeight - $dstHeight) / 2);