Remove unnecessary casts to void

Change-Id: Ib817e07d4becd7c4cf92501b747d7628ef231c55
diff --git a/cui/source/options/optjava.cxx b/cui/source/options/optjava.cxx
index 41430d5..a0d4d8d 100644
--- a/cui/source/options/optjava.cxx
+++ b/cui/source/options/optjava.cxx
@@ -640,7 +640,7 @@ bool SvxJavaOptionsPage::FillItemSet( SfxItemSet* /*rCoreSet*/ )
        for ( i = 0; i < nSize; ++i )
            pParamArr[i] = pList[i].pData;
        eErr = jfw_setVMParameters( pParamArr, nSize );
        SAL_WARN_IF(JFW_E_NONE != eErr, "cui.options", "SvxJavaOptionsPage::FillItemSet(): error in jfw_setVMParameters"); (void)eErr;
        SAL_WARN_IF(JFW_E_NONE != eErr, "cui.options", "SvxJavaOptionsPage::FillItemSet(): error in jfw_setVMParameters");
        rtl_freeMemory( pParamArr );
        bModified = true;
    }
@@ -651,7 +651,7 @@ bool SvxJavaOptionsPage::FillItemSet( SfxItemSet* /*rCoreSet*/ )
        if ( m_pPathDlg->GetOldPath() != sPath )
        {
            eErr = jfw_setUserClassPath( sPath.pData );
            SAL_WARN_IF(JFW_E_NONE != eErr, "cui.options", "SvxJavaOptionsPage::FillItemSet(): error in jfw_setUserClassPath"); (void)eErr;
            SAL_WARN_IF(JFW_E_NONE != eErr, "cui.options", "SvxJavaOptionsPage::FillItemSet(): error in jfw_setUserClassPath");
            bModified = true;
        }
    }
@@ -682,7 +682,7 @@ bool SvxJavaOptionsPage::FillItemSet( SfxItemSet* /*rCoreSet*/ )
                    }

                    eErr = jfw_setSelectedJRE( pInfo );
                    SAL_WARN_IF(JFW_E_NONE != eErr, "cui.options", "SvxJavaOptionsPage::FillItemSet(): error in jfw_setSelectedJRE"); (void)eErr;
                    SAL_WARN_IF(JFW_E_NONE != eErr, "cui.options", "SvxJavaOptionsPage::FillItemSet(): error in jfw_setSelectedJRE");
                    bModified = true;
                }
            }