doomdef.h: refactor comptime externs

src/doomdef.h

@@ -663,9 +663,15 @@ UINT32 quickncasehash (const char *p, size_t n)
 #define PUNCTUATION "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"
 
 // Compile date and time and revision.
-extern const char *compdate, *comptime, *comprevision, *compbranch;
-extern int compuncommitted, compoptimized;
-extern const char *comptype;
+extern const char
+	*compdate,
+	*comptime,
+	*comprevision,
+	*compbranch,
+	*comptype;
+extern int
+	compuncommitted,
+	compoptimized;
 
 // Disabled code and code under testing
 // None of these that are disabled in the normal build are guaranteed to work perfectly