coverity#1209781 Resource leak

We should free pTV_modify when we're done with it.

Change-Id: I7eaf64df2f7bdf6bd899d3a31cad499c4066c990

sal/qa/osl/file/osl_File.cxx

@@ -1868,6 +1868,7 @@ namespace osl_FileStatus
             //delete file
             deleteTestFile( aTypeURL );
             free( pTV_current );
+            free( pTV_modify );
 
             CPPUNIT_ASSERT_MESSAGE( "test for getModifyTime function: This test turns out that UNX pricision is no more than 1 sec, don't know how to improve this function.  ",
                                     bOK );