Fix bad memory handling in traceCommand

trace.c

@@ -286,12 +286,13 @@ void traceCommand(char *id, char *format, ...)
 		va_end(argptr);
 		if(len >= sizeof(buffer)){
 			buf = malloc(len+1);
-			memset(buf,0,len+1);
 			if(buf != NULL){
+				memset(buf,0,len+1);
 				va_start(argptr,format);
 				len = vsnprintf(buf, len+1,format,argptr);
 				va_end(argptr);
 				traceprint("com",id,buf);
+				free(buf);
 			}
 		} else {
 			traceprint("com",id,buffer);