#924 RGB() & RGBA() macros return incorrect data-type

[MrSwiss]

Just a reminder report as requested by coderJeff.

Expected data-type: ULong (fixed-len, 32 bit)
Returned data-type: UInteger (var-len 32/64 bit)

Forum reference: https://www.freebasic.net/forum/viewtopic.php?f=9&p=275388#p275366

New proposed implementation:

#Define RGBA(r, g, b, a)    CULng(CUByte(a) Shl 24 + CUByte(r) Shl 16 + CUByte(g) Shl 8 + CUByte(b))
#Define RGB(r, g, b)        CULng(CUByte(255) Shl 24 + CUByte(r) Shl 16 + CUByte(g) Shl 8 + CUByte(b))

[Jeff Marshall]

updated in [4db1686b779a836e9a045e99c37394cf8c81caf0]

The new bulit-in RGB and RGBA macros are:

#define RGB(r,g,b) culng((cubyte(r) shl 16) or (cubyte(g) shl 8) or cubyte(b) or (&hFF000000ul))        
#define RGBA(r,g,b,a) culng((cubyte(r) shl 16) or (cubyte(g) shl 8) or cubyte(b) or (cubyte(a) shl 24)) 

Also changed in [443b13ec145505070c1dcb767eddf1df815fe0f7]
POINT() gfx function now returns ULONG