CSV import: return value only if it exists

If the last two fields were empty, we returned the field separator as
next to last value. Now we make sure not to return field separator as
field value.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>

xslt/commonTemplates.xsl

@@ -259,7 +259,7 @@
                 <xsl:value-of select="substring-before($line,$fs)"/>
               </xsl:when>
               <xsl:otherwise>
-                <xsl:if test="substring-after($line, $fs) = ''">
+                <xsl:if test="substring-after($line, $fs) = '' and $line != $fs">
                   <xsl:value-of select="$line"/>
                 </xsl:if>
               </xsl:otherwise>