common.c, va(): make VA_BUFFERLEN the maximum of 1024 or MAX_OSPATH

because va() can be used for generating path names

Author: sezero

engine/h2shared/common.c

@@ -168,7 +168,11 @@ is defined in VA_NUM_BUFFS.
 ============
 */
 #define	VA_NUM_BUFFS	4
+#if (MAX_OSPATH >= 1024)
+#define	VA_BUFFERLEN	MAX_OSPATH
+#else
 #define	VA_BUFFERLEN	1024
+#endif
 
 static char *get_va_buffer(void)
 {