use ATTRINLINE rather than inline to match some of the other functions in this...

use ATTRINLINE rather than inline to match some of the other functions in this file, though I'm told modern compilers ignore inlining info as they actually decide themselves now

(though I could pretend we still support the older ones lol)

src/m_fixed.h

@@ -39,12 +39,12 @@ typedef INT32 fixed_t;
   \brief convert fixed_t into floating number
 */
 
-FUNCMATH FUNCINLINE static inline float FixedToFloat(fixed_t x)
+FUNCMATH FUNCINLINE static ATTRINLINE float FixedToFloat(fixed_t x)
 {
 	return x / (float)FRACUNIT;
 }
 
-FUNCMATH FUNCINLINE static inline fixed_t FloatToFixed(float f)
+FUNCMATH FUNCINLINE static ATTRINLINE fixed_t FloatToFixed(float f)
 {
 	return (fixed_t)(f * FRACUNIT);
 }