Gerbview: Gerber attributes display: fix incorrect attributes deletion.

The Gerber attribute deletion command (%TD,xxx) always cleared all attributes,
instead of clearing xxx attribute.
Therefore some attributes were not always displayed.

gerbview/gerber_file_image.cpp

@@ -379,9 +379,10 @@ void GERBER_FILE_IMAGE::RemoveAttribute( X2_ATTRIBUTE& aAttribute )
      * if a attribute name is specified (for instance %TD.CN*%) is specified,
      * only this attribute is cleared
      */
-    m_NetAttributeDict.ClearAttribute( &aAttribute.GetPrm( 1 ) );
+    wxString cmd = aAttribute.GetPrm( 0 );
+    m_NetAttributeDict.ClearAttribute( &cmd );
 
-    if( aAttribute.GetPrm( 1 ).IsEmpty() || aAttribute.GetPrm( 1 ) == ".AperFunction" )
+    if( cmd.IsEmpty() || cmd == ".AperFunction" )
         m_AperFunction.Clear();
 }
 

gerbview/rs274x.cpp

@@ -172,8 +172,10 @@ bool GERBER_FILE_IMAGE::ReadRS274XCommand( char *aBuff, unsigned int aBuffSize,
             default:
                 code_command = ReadXCommandID( aText );
                 ok = ExecuteRS274XCommand( code_command, aBuff, aBuffSize, aText );
+
                 if( !ok )
                     goto exit;
+
                 break;
             }
         }
@@ -364,7 +366,7 @@ bool GERBER_FILE_IMAGE::ExecuteRS274XCommand( int aCommand, char* aBuff,
 
     case FILE_ATTRIBUTE:    // Command %TF ...
         m_IsX2_file = true;
-    {
+        {
         X2_ATTRIBUTE dummy;
         dummy.ParseAttribCmd( m_Current_File, aBuff, aBuffSize, aText, m_LineNum );
 
@@ -381,7 +383,7 @@ bool GERBER_FILE_IMAGE::ExecuteRS274XCommand( int aCommand, char* aBuff,
         {
             m_PartString = dummy.GetPrm( 1 );
         }
-     }
+        }
         break;
 
     case APERTURE_ATTRIBUTE:    // Command %TA