- fixed initialization of model frames

Replaced loop arrays initialization and obvious comments with something more readable, I hope

https://forum.zdoom.org/viewtopic.php?t=72523

src/r_data/models.cpp

@@ -413,25 +413,18 @@ static void ParseModelDefLump(int Lump)
 			{
 				smf.modelsAmount = MIN_MODELS;
 			}
-			//Allocate TArrays
-			smf.modelIDs.Alloc(smf.modelsAmount);
-			smf.skinIDs.Alloc(smf.modelsAmount);
-			smf.surfaceskinIDs.Alloc(smf.modelsAmount * MD3_MAX_SURFACES);
-			smf.modelframes.Alloc(smf.modelsAmount);
-			//Make sure all modelIDs are -1 by default
-			for (auto& modelID : smf.modelIDs)
-			{
-				modelID = -1;
-			}
-			//Make sure no TArray elements of type FTextureID are null. These elements will have a textureid (FTextureID.texnum) of 0.
-			for (auto& skinID : smf.skinIDs)
-			{
-				skinID = FTextureID(FNullTextureID());
-			}
-			for (auto& surfaceskinID : smf.surfaceskinIDs)
+
+			const auto initArray = [](auto& array, const unsigned count, const auto value)
 			{
-				surfaceskinID = FTextureID(FNullTextureID());
-			}
+				array.Alloc(count);
+				std::fill(array.begin(), array.end(), value);
+			};
+
+			initArray(smf.modelIDs, smf.modelsAmount, -1);
+			initArray(smf.skinIDs, smf.modelsAmount, FNullTextureID());
+			initArray(smf.surfaceskinIDs, smf.modelsAmount * MD3_MAX_SURFACES, FNullTextureID());
+			initArray(smf.modelframes, smf.modelsAmount, 0);
+
 			sc.RestorePos(scPos);
 			sc.MustGetStringName("{");
 			while (!sc.CheckString("}"))