2026:72: Result of 'malloc' is incompatible with type 'unsigned char *'

2026:72: Result of 'malloc' is converted to a pointer of type 'unsigned char', which is incompatible with sizeof operand type 'unsigned char *'
Merge pull request #6194 from iSevenDays/patch-2

Result of 'malloc' is incompatible with type 'unsigned char *' in Image::saveImageToPNG.