add newline at end of file where it's lacking

.editorconfig already enforces it but it's getting changed piecemeal in
every commit. just get it done with.

the script:
```

find . -type f -not -path "./.git/*" -not -path "./.vs/*" | while read -r file; do
	isFile=$(file -0 "$file" | cut -d $'\0' -f2)
	case "$isFile" in
		(*text*)
			echo "$file is text"
			if [[ $(tail -c 1 "$file" | wc -l) -ne 1 ]]; then
				echo "" >> "$file"
			fi
			;;
		(*)
			echo "file isn't text"
			;;
	esac
done
```

ext/export/src/ja2/Structure Internals.h

@@ -240,4 +240,4 @@ typedef struct TAG_STRUCTURE_FILE_HEADER
 #define STRUCTURE_FILE_CONTAINS_AUXIMAGEDATA		0x01
 #define STRUCTURE_FILE_CONTAINS_STRUCTUREDATA		0x02
 
-#endif
+#endif

ext/export/src/ja2/Types.h

@@ -100,4 +100,4 @@ typedef VECTOR4			MATRIX4[4];		// 4x4 matrix
 typedef	VECTOR4			COLOR;			// rgba color array
 
 
-#endif
+#endif