fflush() followed by fclose() is redundant

Change-Id: Iacb9332635cb6afa90ec1a72e96388b3b5b7b56c
Reviewed-on: https://gerrit.libreoffice.org/52420
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

idlc/source/idlccompile.cxx

@@ -202,9 +202,8 @@ bool copyFile(const OString* source, const OString& target)
     if (source != nullptr) {
         fclose(pSource);
     }
-    if ( fflush(pTarget) )
+    if ( fclose(pTarget) )
         bRet = false;
-    fclose(pTarget);
 
     return bRet;
 }

sal/osl/unx/backtrace.c

@@ -129,7 +129,6 @@ void backtrace_symbols_fd( void **buffer, int size, int fd )
             fprintf( fp, "[%p]\n", *pFramePtr );
         }
 
-        fflush( fp );
         fclose( fp );
     }
 }
@@ -209,7 +208,6 @@ void backtrace_symbols_fd( void **buffer, int size, int fd )
             }
             fprintf( fp, "[%p]\n", *pFramePtr );
         }
-        fflush( fp );
         fclose( fp );
     }
 }
@@ -277,7 +275,6 @@ void backtrace_symbols_fd( void **buffer, int size, int fd )
             fprintf( fp, "[%p]\n", *pFramePtr );
         }
 
-        fflush( fp );
         fclose( fp );
     }
 }

xmlscript/test/imexp.cxx

@@ -131,7 +131,6 @@ void exportToFile(
 
     FILE * f = ::fopen( fname, "w" );
     ::fwrite( bytes.getConstArray(), 1, bytes.getLength(), f );
-    ::fflush( f );
     ::fclose( f );
 }