Rewrote get/set_proto_data functions in C++ and added an auto-extend mechanism for proto loading limit (from Mr.Stalin)

Replaced ProtoProcessingLimit with LoadProtoMaxLimit option.
Added more definitions to define_extra.h and reformatted sfall.h a bit.

artifacts/ddraw.ini

@@ -347,6 +347,10 @@ CorpseLineOfFireFix=0
 ;Set to 1 (or some higher number if needed, the maximum is 127) to prevent 100% CPU use
 ProcessorIdle=-1
 
+;Set a number of how many protos of a type can be loaded into memory at once (valid range: 512..4096)
+;Set to -1 to let set_proto_data script function automatically increase the limit when needed
+LoadProtoMaxLimit=-1
+
 ;Set to 1 if using the hero appearance mod
 EnableHeroAppearanceMod=0
 
@@ -549,10 +553,6 @@ ExplosionsEmitLight=0
 ;MovieTimer_artimer3=270
 ;MovieTimer_artimer4=360
 
-;Uncomment the next line to change how many protos the engine can process at once (valid range: 512..16384)
-;Set to 1024 or some higher number to avoid some glitches with scripts that will process a large number of protos
-;ProtoProcessingLimit=512
-
 ;Set to 1 to enable the new arrays behavior
 ;Set to 0 for backward compatibility with pre-3.4 scripts
 arraysBehavior=1