Fix typos in translatable strings.

fix also a coding style issue.

pcbnew/load_select_footprint.cpp

@@ -438,14 +438,14 @@ bool FOOTPRINT_EDIT_FRAME::SaveLibraryAs( const wxString& aLibraryPath )
 
         if( !cur )
         {
-            msg = wxString::Format( _( "Unable to find a reader for '%s." ), curLibPath );
+            msg = wxString::Format( _( "Unable to find a reader for '%s'." ), curLibPath );
             DisplayError( this, msg );
             return false;
         }
 
         if( !dst )
         {
-            msg = wxString::Format( _( "Unable to find a writer for '%s." ), dstLibPath );
+            msg = wxString::Format( _( "Unable to find a writer for '%s'." ), dstLibPath );
             DisplayError( this, msg );
             return false;
         }

pcbnew/plugin.cpp

@@ -325,10 +325,11 @@ bool PLUGIN::fileStartsWithBinaryHeader( const wxString& aFilePath, const std::v
 
     if( input.IsOk() && !input.Eof() )
     {
-        if (input.GetLength() < aHeader.size())
+        if( input.GetLength() < aHeader.size() )
             return false;
 
         std::vector<uint8_t> parsedHeader(aHeader.size());
+
         if (!input.ReadAll(parsedHeader.data(), parsedHeader.size()))
             return false;