another obvious warning fix

[Zack Weinberg]

CONTIN is used as the sole clause of an if statement, so it needs a dummy
definition that doesn't trigger the "empty body" warning.

Applied.

zw

	* dbxout.c (CONTIN): If it doesn't have to do anything, give it a
	definition that doesn't provoke the "empty body in an
	if-statement" warning.

===================================================================
Index: dbxout.c
--- dbxout.c	2000/03/25 18:34:01	1.54
+++ dbxout.c	2000/04/04 21:22:31
@@ -307,7 +307,7 @@ static int current_sym_nchars;
 #define CONTIN  \
   do {if (current_sym_nchars > DBX_CONTIN_LENGTH) dbxout_continue ();} while (0)
 #else
-#define CONTIN
+#define CONTIN do { } while (0)
 #endif
 
 #if defined(ASM_OUTPUT_SECTION_NAME)